Twelve AI reply tools for X, Reddit and LinkedIn, grouped by the thing that actually decides the choice: who presses post. Every platform list, price and mechanism below was read off the vendor's own site or store listing on 14 September 2026.
Almost every "best AI reply tool" ranking is written by one of the tools, and almost every one of them finishes first in its own list. This roundup is also written by a vendor. ReplySurge makes the Chrome extension that appears as entry seven below, and you should read the page knowing that.
What we can offer in exchange is a page you can use even if you pick a rival. Every competitor detail here was read off that vendor's own website or Chrome Web Store listing on 14 September 2026, not lifted from another blog. Where a vendor contradicts itself, this page says so instead of picking the flattering version. Where a vendor publishes no price, this page says the price is not published instead of guessing. And every tool gets a plain best-for line, including the eight that beat ReplySurge on something specific.
The tools are not ranked. Ranking twelve products with different shapes on one axis produces a number nobody can act on. They are grouped instead by the question that genuinely decides the purchase, and that most roundups never ask: when a reply goes out, whose hand and whose account sent it?
Most AI reply tools only draft. Seven of the twelve tools on this page write a suggestion and stop there, leaving you to paste, edit and post. Four publish from accounts you connect yourself, either on a schedule or after you approve the text. One replies from accounts the vendor buys and hands to you. Those three groups carry different amounts of work, different amounts of risk and completely different prices, and once you know which group you want, the shortlist inside it is short.
The group boundaries are not always clean, and this page flags the two places they blur. WalleAgent shows a "No auto-posting" badge on its homepage while both of its paid plans list Twitter Reply Automation as a feature. ReplyGuy sits in group three on Reddit and group one on X, because on X it drafts and you post.
Ordered by group, not by rank. Prices are the vendor's own published monthly figures unless noted.
| Tool | Platforms | Who presses post | Published price | Form factor |
|---|---|---|---|---|
| 1Stroke | Any website with a text field, no per-platform integration | You do | Free $0; Premium $7.50/mo; Teams custom, billed annually | Chrome extension, driven from the right-click menu |
| Commenter AI | LinkedIn, Gmail, Google Calendar | You do | Signals $99/mo; Workflow $149/mo; Teams $350/mo | Web app with account integrations |
| Engage AI | LinkedIn only | You do | Individual $50/mo; Group $250/mo (billed as engagement community plans) | Chrome extension plus web app |
| EzReply | X, LinkedIn, Reddit, including DMs on X and LinkedIn | You do | Not published. Free plan and premium plans are described, with no figures | Chrome extension, desktop only |
| ReplyGenius | Reddit, X, LinkedIn | You do, after it inserts the draft into the comment box | Free $0; Starter $9/mo; Pro $19/mo | Chrome extension with an account |
| ReplyKit | X, LinkedIn, Reddit | You do | Pro EUR 6.99/mo; a free tier exists, see the note below | Chrome extension, with a mobile web app on Pro |
| ReplySurge | X, Reddit (new and old), LinkedIn | You do, every time. It never posts | Not published as a figure. Free to install, free trial, paid plans unlock unlimited replies | Chrome extension, side panel plus an inline reply-box button |
| Hypefury | Bluesky, Threads, LinkedIn, Instagram, TikTok. No X support. | Hypefury publishes from your connected channels | Flexible $6/mo for 1 channel; Full $19/mo all channels | Web app |
| Kleo | Kleo publishes on a schedule, from content you approve | Standard $99/mo, plus $49/mo per extra profile; $999/yr annual | Web app, with a Chrome extension for saving content | |
| Taplio | LinkedIn only | Taplio acts on your behalf. Its FAQ says it writes, comments and engages on your behalf | Starter $39/mo; Growth $69/mo; Pro $199/mo | Web app, plus a free Chrome extension add-on |
| WalleAgent | Store listing names Twitter, Facebook, LinkedIn, Reddit, ProductHunt; paid plans promise "5 social platforms" without itemising | Review then publish in one click, and both paid plans also list Twitter Reply Automation | Free $0 (100 replies); Basic $5 (1,000 replies); Pro $10 (3,000 replies). One-off, 1 year validity, no subscription | Chrome extension plus a web account |
| ReplyGuy | Reddit and X. No LinkedIn | Reddit: ReplyGuy posts from purchased accounts it sends you. X: you post | Small $10/mo; Analyst $39/mo (no auto-replies); Pro $49/mo; Business $99/mo; Enterprise $199/mo | Web app and managed service, no extension |
All product names are the property of their respective owners. Details above reflect public information verified on 14 September 2026 and can change at any time, and several vendors say so themselves. Confirm current features and pricing with each vendor before you buy: 1stroke.ai, commenter.ai, engage-ai.co, ezreply.co, hypefury.com, kleo.so, fredericlegrand.me/replykit, replygenius.io, replyguy.com, taplio.com, walleagent.com. One note on ReplyKit's free tier: its store listing and its product page give different free-tier reply counts and disagree on whether Pro is capped, so this page publishes the EUR 6.99 figure only.
Seven of the twelve. Listed alphabetically, because ranking them against each other would be a guess dressed up as a verdict.
1Stroke is not a social-platform tool at all, and that is the point of it. The extension hangs off the browser's right-click menu and writes, rephrases or explains text in any empty field on any website. Its store copy is explicit about the trigger: right-click any empty text field to reply with AI. It names social media, customer support and e-commerce sellers as audiences rather than shipping integrations for any of them.
Because it is field-based rather than platform-based, 1Stroke has no idea what post you are replying to. It writes into the box; it does not read the thread. The single Chrome Web Store rating is not a meaningful quality signal in either direction.
Best for: anyone whose replying is spread across support desks, review platforms, marketplace messages and webmail rather than concentrated on two or three social networks. A platform-scoped extension like ReplySurge is simply inert on those sites. 1Stroke is not.
Commenter AI has moved on from being a commenting tool, and says so itself. Its own FAQ asks "Is this just another AI commenting tool?" and answers that Commenter AI started with AI commenting, that AI drafting is still included, and that the product is now a sales conversation prioritisation tool. It connects LinkedIn, Gmail and Google Calendar and surfaces the revenue conversations that need attention today.
On the posting question Commenter AI is emphatic. It drafts comments and DMs while the user keeps control, and its own copy promises no scripts, no forced CRM workflow and no automation replacing your conversations. There is no Chrome extension offered anywhere on the site. Its entry price of $99 a month is also the joint highest in this roundup, level with Kleo.
Best for: salespeople who need to know what happened after the reply. Commenter AI ranks live threads by who owes the next move, flags the ones that went quiet, and pulls in email and meeting context. A reply drafter has no memory of whether a thread ever went anywhere, and ReplySurge does not track that either. Commenter AI is the only tool here built around exactly that gap.
Engage AI is LinkedIn only, despite a store listing titled "ChatGPT for Social Media". The listing body is entirely LinkedIn, and the AI operates directly inside the LinkedIn post comment field. It drafts; the user posts.
Engage AI's pricing has changed shape and it is worth knowing before you compare numbers. The pricing page at engage-ai.co is now headed "Engagement Community Plans" and sells a scheduled engagement exchange: members comment on assigned posts from the community, and the vendor describes engagement as a fair exchange where you give as much as you receive. Individual is $50 a month for up to nine engagement sessions a week, Group is $250 a month with unlimited sub-accounts, and a promotional strip offers $10 a month with a code. The Chrome Web Store description still advertises a $30 monthly Pro tier and a free option, which contradicts the pricing page. This page cites the pricing page.
Best for: LinkedIn-only sellers who want their comment activity to land in the systems they already run. Engage AI names Zapier, HubSpot, Hootsuite, Pipedrive and Integrately on its listing, which no standalone reply extension in this roundup touches, ReplySurge included. It also has by far the deepest real-world validation here: 330 ratings at 4.5 stars and 20,000 users, in a field where most rivals have single-digit rating counts.
EzReply covers the same three platforms as ReplySurge and adds one thing ReplySurge does not do: direct messages. Its store body lists DM support for X and LinkedIn alongside public replies, and positions the product for cold outreach as much as for engagement.
EzReply is unusually explicit that it never posts. Its FAQ says every reply is a suggestion that you review and edit before anything gets posted, and its homepage repeats "Edit before you post". The catch is that EzReply publishes no price. Its homepage carries no dollar figure at all, ezreply.co/pricing returns a 404, and the FAQ says only that a free plan exists and that premium plans exist. You will have to install it to find out what it costs.
Best for: people whose outbound lives in the DM inbox rather than in public threads. A reply-box-only extension cannot help you with cold outreach in messages, and EzReply positions itself squarely there.
ReplyGenius covers Reddit, X and LinkedIn from one extension, on the vendor's own wording: works seamlessly on Reddit, X and LinkedIn. The flow described on its store listing is select text, click the ReplyGenius button, choose a style, insert the reply, with the option to copy to clipboard or auto-insert into the comment field. Inserting into the comment box is not posting, so ReplyGenius sits firmly in group one.
Two honest caveats. ReplyGenius has no Chrome Web Store ratings at all and 14 users, so nobody should describe it as well-reviewed, this page included. Its published tiers, though, are among the clearest in the category: free at 25 replies a month, $9 for 300, $19 for 1,000.
Best for: founders who want product mentions woven into replies rather than bolted on. ReplyGenius ships contextual marketing as a first-class feature, storing your product context so the mention is folded into a helpful answer, and it offers named writing personalities as premium styles, which is a sharper stylistic lever than a generic tone picker.
ReplyKit is the closest structural match to ReplySurge in this roundup: one extension, the same three platforms, and no posting. Its store copy promises one extension, three platforms, with a different style and length per platform, short and punchy on X, professional on LinkedIn, casual on Reddit. The vendor states the posting question in one line: "You write and post. AI only suggests text."
Pro costs 6.99 euros a month, which removes the daily cap and switches the model to Claude Sonnet. A free tier exists, but the store listing and the product page give different free-tier reply counts and disagree on whether Pro is capped, so no free-tier number appears on this page. One practical note when you go looking for it: the site the Chrome Web Store verifies as ReplyKit's publisher is fredericlegrand.me/replykit, and similarly named domains are not it.
Best for: technical users who would rather pay a model provider than a vendor. ReplyKit lets you plug in your own OpenAI, Claude or Gemini API key, which a hosted-only extension like ReplySurge structurally cannot offer, and it has a genuinely free path that needs no account. Its "Polish my draft" feature also rewrites a rough thought you typed yourself rather than generating from scratch.
ReplySurge reads the specific post in front of you on X, Reddit or LinkedIn and drafts an on-brand reply that you paste and post yourself. It runs as a browser side panel and as an inline button in the reply box, with tones, a promotion-level control and one-tap refinements such as shorter, punchier, less promotional, more specific and add a question. A company profile is set up once, or imported from your website, and the drafts adapt to the replies you post and the edits you make to them.
ReplySurge never posts. There is no queue, no schedule and no publishing step of any kind, on any of the three platforms, which is also the honest limit of the product: the volume you get is the volume you are willing to sit and paste. Its content scripts run only on x.com, twitter.com, linkedin.com and the Reddit domains, so it does nothing anywhere else. It also does no analytics, no scheduling and no content calendar. Like the other extensions in group one, it is subject to each platform's ordinary spam rules; drafting with AI does not exempt anyone from them, and posting fifty near-identical replies an hour is a problem whoever wrote them.
Best for: someone who wants to show up across X, Reddit and LinkedIn in their own voice, from their own account, and is unwilling to let software post on their behalf anywhere. If any part of that sentence does not describe you, one of the other eleven tools on this page probably fits better.
Four tools publish through an account you connect yourself. Most of them are scheduling suites first and reply helpers second.
Hypefury no longer supports X, and anyone shortlisting it as an X tool should know that first. Its pricing-page FAQ answers the question "Does Hypefury still support X/Twitter?" with a flat no. X and Twitter links remain in the site footer as legacy marketing pages, which is a trap the category's other roundups keep falling into. Hypefury publishes no reason and no date for the change, and neither does this page.
What Hypefury does is schedule and cross-post. Unlimited scheduled posts, cross-posting to every connected channel, plus autoplugs and auto-DMs on Instagram. It publishes on your behalf from channels you connect. Flexible is $6 a month for one channel with each additional platform at another $6, and Full is $19 a month with all channels included.
Best for: the cheapest paid tool in this entire roundup, and the only one that reaches Bluesky, Threads, Instagram and TikTok. If your audience is on those networks, nothing else here covers them at any price. Hypefury also does the one thing a reply drafter deliberately will not: scheduled cross-posting of original content from a single composer.
Kleo publishes. Its Standard plan describes post management, preview and format editing with one-click scheduling and publishing, and the vendor frames the control question carefully: Kleo helps you research, write, organise, schedule and analyse while you keep complete control of what gets published. In practice that is scheduled publishing on your behalf, from content you approved.
Kleo is LinkedIn-focused and its plan bullet is specifically LinkedIn scheduling. The founder's note on the site describes Kleo as having started as a small Chrome extension that grew to over 70,000 users before the product moved to the web app, and the store listing is consistent with that history: 30,000 users and 70 ratings, with the extension last updated on 23 June 2025. Pricing is $99 a month, plus $49 a month for each additional profile, or $999 a year.
Best for: people who want to be taught, not just tooled. Kleo wraps a content strategy, a library of more than 400 templates and 200 high-performing post examples, generated visuals, live weekly calls with the Kleo team, group onboarding and a private community around the software. No reply extension in this roundup offers coaching, and ReplySurge certainly does not.
Taplio acts on your behalf, in its own words. Its FAQ argues that Taplio is safe to use because it behaves exactly like a real LinkedIn user would, writing posts, commenting and engaging naturally on your behalf. The product nav carries Schedule, Engage and Automate as separate features, and the Pro plan bullet is "Automate lead outreach". Any comparison that credits Taplio with more restraint than that is understating the product.
Taplio is LinkedIn only. Its own FAQ describes it as the all-in-one AI-powered tool to grow your brand on LinkedIn, and every resource and free tool on the pricing page is LinkedIn-specific. Starter is $39 a month, Growth is $69 and adds AI post writing and faster replying, Pro is $199 and adds unlimited AI posts and comments plus automated lead outreach. A yearly toggle shows $32, $49 and $149 equivalents. One naming point worth clearing up, because the category gets it wrong constantly: Taplio X is a LinkedIn extension, not a Taplio product for X or Twitter. As of 14 September 2026 the Taplio X store listing returns "This item is not available", so treat its availability as unsettled and check with the vendor.
Best for: anyone who wants their whole LinkedIn operation in one paid tool. Scheduling, carousels, analytics, post inspiration, a lead CRM, an API and a LinkedIn benchmark dataset of more than 60,000 posts analysed monthly. If the job is measuring performance and planning a calendar rather than writing a good reply, Taplio covers ground ReplySurge does not touch.
WalleAgent describes itself two ways, and an honest roundup has to print both. A trust badge on walleagent.com reads "No auto-posting", and the How It Works section describes reviewing AI-suggested actions and publishing in one click. At the same time, both paid plans list Twitter Reply Automation as a feature, the store listing header reads "Reply Automation For Twitter", and the store changelog entry for version 1.2.0 reads "support twitter(x) reply automation". The fair summary is that WalleAgent is review-then-publish for the ordinary flow and additionally sells a Twitter reply-automation feature.
Its platform coverage needs the same care. The homepage strip lists eight networks, the store description names five, and the paid plans promise "5 social platforms" without itemising which five. Buy on the plan wording, not the marketing strip. Pricing is genuinely unusual: Free gives 100 replies, Basic is a one-off $5 for 1,000 replies and Pro a one-off $10 for 3,000, each valid for a year with no recurring charge. One practical note from 14 September 2026: the Add to Chrome button on WalleAgent's store listing did not render as enabled in our session while the ReplyKit, EzReply, Engage AI, ReplyGenius and Kleo listings all did, and we could not establish why, so confirm you can actually install it before planning around it.
Best for: the lowest cost per reply of any tool here, and the only one with no subscription at all. A thousand replies for five dollars, valid for twelve months, with nothing to cancel. For an occasional replier that is materially cheaper and lower-commitment than every monthly plan in this roundup, ReplySurge included, and its 100-reply free tier is the largest one-off free allowance we verified.
One tool in this roundup does, on one platform, and it says so plainly on its own homepage.
ReplyGuy answers the account question directly. Its homepage FAQ, headed "What accounts send the replies?", says that for Reddit it uses purchased accounts that will be provided to the subscriber by email within a few days of subscribing, and that for Twitter it helps you find the best places to reply and suggests what to say, but it is up to you to edit and post the reply. Those are the vendor's own words, and they are the clearest statement of mechanism anywhere in this category.
ReplyGuy monitors keywords across Reddit and X around the clock, picks the posts worth a mention, writes the reply and, on Reddit, posts it, with sentiment analysis and reporting on top. Its pricing is keyword-based and lower than most people assume: Small is $10 a month with auto-replies included, Pro is $49, Business is $99 and Enterprise is $199. Read the $39 Analyst tier carefully before buying it, because it is the one plan whose card says "No auto-replies"; it is a monitoring tier, and a cheaper plan does more of what the product is famous for. Annual billing is offered, but the homepage and the pricing page state different annual discounts, so confirm that figure with the vendor.
Best for: volume without attention. ReplyGuy runs unattended, and its own pitch is that it works around the clock while you do more important things. A human-in-the-loop extension requires the human, every single time, and if what you want is posting genuinely handled for you rather than drafting handled for you, ReplyGuy is the tool on this page that actually does it.
The split traces to a change X made to its API in February 2026, and X documented it on its own channels, which is rare enough in this category to be worth citing properly. On 23 February 2026 X restricted programmatic replies through the X API v2. The announcement on X's developer forum puts the new rule in one sentence:
"Previously, the POST /2/posts endpoint allowed any authenticated user/app to reply to any post by specifying in_reply_to_tweet_id. Moving forward, replies via the API will only be permitted if the replier has been explicitly summoned by the original post's author." X Developer Platform Team, 23 February 2026, X API v2 Update: Addressing LLM-Generated Spam. See also X's API changelog for 23 February 2026 and the @XDevelopers post.
Summoned means the original author at-mentioned the replying account or quoted one of its posts. If neither is true, X's announcement says the attempt to reply through the API is blocked or rejected. The restriction applies to the self-serve tiers, legacy Free, Basic and Pro subscriptions and pay-per-use packages, and X says Enterprise access is not impacted, directing developers who need broader capability to upgrade. X publishes no Enterprise price, so what that exemption costs is not public.
Reddit was not part of that change, which is why a service can still reply there programmatically while drafting only on X. ReplyGuy does not state the API change as its reason for the split, so treat the connection as our reading of two public facts rather than the vendor's stated motive.
There is a second rule that matters here, and it is the one that explains why a tool cannot simply route around the API by driving a browser instead. X's Automation Rules, stamped Updated April 2026, list this under what not to do:
"Use non-API-based forms of automation, such as scripting the X website. The use of these techniques may result in the permanent suspension of your account." X Automation Rules, help.x.com.
Those are X's published rules, quoted without comment on any particular vendor. This page does not claim that any named tool breaks them, because the mechanism behind a given product's X posting is rarely something an outsider can verify. What a buyer can do is ask a vendor directly how its X replies are sent, and compare the answer against the two rules above.
One thing that is worth saying because it cuts against our own interest: none of this makes a human-in-the-loop tool exempt from anything. X's rules address automated replies and are silent on a person using an assistant to draft a reply they post themselves. Silent is not the same as approved, no approval or whitelisting status exists for this, and ReplySurge does not hold one. X's authenticity policy separately prohibits posting content in a bulk, duplicative, irrelevant or unsolicited manner, and that applies regardless of how the text was written. A person hand-pasting fifty near-identical AI replies an hour is doing the thing the rule describes.
WalleAgent has the lowest published cost per reply of anything in this roundup: a one-off $5 buys 1,000 replies, valid for a year, with no subscription and no recurring charge. Hypefury has the cheapest monthly subscription at $6 a month for a single channel, but Hypefury no longer supports X, so it is only cheap if it covers the networks you actually use. Among the draft-only extensions that cover X, Reddit and LinkedIn together, ReplyKit publishes the lowest paid price at 6.99 euros a month, followed by ReplyGenius at $9 a month for 300 replies.
Free tiers are common but small. ReplyGenius gives 25 replies a month at no cost, WalleAgent gives a one-off 100, 1Stroke has a free tier with no recurring charge, and ReplyKit has a free path that needs no account. EzReply says it has a free plan but publishes no pricing at all, so its paid tiers cannot be compared with anything. ReplySurge is free to install with a free trial and does not publish a figure either, which means it belongs in exactly the same caveat: you cannot price-compare it from the outside.
Five tools cover both Reddit and X: EzReply, ReplyGenius, ReplyGuy, ReplyKit and ReplySurge. WalleAgent names both on its Chrome Web Store listing, with the caveat above that its paid plans promise five platforms without saying which five. 1Stroke will type into a Reddit comment box because it works in any text field on any website, but it reads nothing about the thread and ships no Reddit-specific behaviour.
Everything else in this roundup is a LinkedIn product or close to it. Commenter AI, Engage AI, Kleo and Taplio do not cover Reddit at all, and Hypefury covers neither Reddit nor X. That matters more than it looks, because Reddit and X reward opposite registers. A reply that works on LinkedIn usually reads as an advertisement in a subreddit, so a tool that treats the three networks identically is not really covering three networks.
Engage AI and Kleo have far larger installed bases than anything else on this page, ReplySurge included. Engage AI shows 4.5 stars from 330 ratings and 20,000 users, with its extension updated on 14 September 2026, the day these figures were checked. Kleo shows 4.5 stars from 70 ratings and 30,000 users, though its extension was last updated on 23 June 2025, which is consistent with the product having moved to the web app.
The rest of the field is thin, and buyers should read it as thin. EzReply has 14 ratings and 119 users, WalleAgent 4 ratings and 116 users, ReplyKit 4 ratings and 57 users, 1Stroke a single rating and 16 users, and ReplyGenius has no ratings at all and 14 users. A perfect 5.0 from four people is not evidence of quality in either direction, and no page, this one included, should present it as such.
Eight of the eleven other tools on this page beat ReplySurge at something specific. Here they are, named.
Two more worth naming even though they are further from ReplySurge's shape. If you need to know which conversations went quiet after the reply, Commenter AI is the only tool here that tracks that. If your audience is on Bluesky, Threads, Instagram or TikTok, Hypefury is the only tool here that reaches them.
Head-to-head pages with more detail on four of these tools: Taplio X alternative, Engage AI alternative, ReplyGuy alternative and ReplyKit alternative. Or start at the ReplySurge home page.
ReplySurge drafts on-brand replies for X, Reddit and LinkedIn and never posts them. Free to install, and this page told you where the other eleven win.