This comparison was first written because three products kept appearing in the same “best AI tools for X” lists while doing three different jobs. Re-checking it produced a bigger finding than a feature gap: one of the three no longer supports X at all, and its own site says so plainly. That makes this page a test of a wider habit — the tool recommendation you read last year may have expired without anyone updating the article.
TweetReplier drafts replies and posts inside X with tone and voice controls, and has no auto-posting mode. Typefully is a polished writing and scheduling workspace for X, LinkedIn and Threads. Hypefury no longer supports X — its pricing page answers the question directly with “Nope!” and lists Bluesky, Threads, LinkedIn, Instagram and TikTok as its channels. Choose by the job, then check the vendor’s own pages, because recommendation lists outlive the products they describe.
Three tools, three jobs, one expired listing
Start with the job description, since that is where the products genuinely diverge — and with the status column, which is where they stopped being comparable.
| TweetReplier | Typefully | Hypefury | |
|---|---|---|---|
| Still an X tool? | Yes — built for X, runs in Chrome | Yes — X scheduling is one of three named surfaces | No — the vendor states it no longer supports X |
| The job | Draft contextual replies and posts while you are in an X conversation | Write, polish and schedule posts on a calendar | Schedule and automate across Bluesky, Threads, LinkedIn, Instagram and TikTok |
| Where you work | Inside X, in Chrome | Web workspace | Web workspace |
| Who presses publish | You, always | You, or the queue on a schedule | You, or the queue on a schedule |
| AI personalization | 14 tones, auto-tone, voice profile, optional persona training | AI writing features are listed on the paid tiers | AI trained on your posts |
| Free path | Free plan, 25 generations/month, no card, no API key | Free plan with a 10 posts/month publishing limit | No free plan — a 7-day trial that asks for no card |
The prices on this page were re-checked against vendor sites on 14 October 2026, and where a vendor does not publish a stable figure the cell says so rather than guessing. That matters more than it sounds: the last version of this comparison carried three figures marked as unverified, and one of them was hiding the fact that the product had left the platform entirely.
TweetReplier: drafting replies in the conversation
TweetReplier is a Chrome extension that generates replies, posts, rewrites and analyses where the conversation is happening. You read a post, choose a tone from 14 options or let auto-tone pick, and get drafts that include the context — including a sarcasm check before generation. A voice profile carries your role, topics and writing preferences across sessions, and the Creator plan trains on your own writing.
It is deliberately not a scheduler. There is no queue, no calendar and no unattended mode; nothing leaves your account without your click. That is a constraint if you want calendar publishing, and a feature if you want an assistant that cannot post without you. For people whose only need is replies to conversations they are already in, the extension model removes the copy-paste step entirely.
Typefully: a writing and scheduling workspace
Typefully is a web app for writing drafts, threads and posts, then publishing them on a schedule. Its own site names three scheduling surfaces — X, LinkedIn and Threads — and its pricing page lists a free plan with a published limit of ten posts per month, above which two paid tiers (Creator and Business) add X analytics, AI writing features, unlimited media uploads and higher publishing volume, with the Business tier priced per social set and billed yearly.
One honest gap: Typefully renders its prices with an animated counter when the page loads, so no monthly figure can be quoted here without guessing. Check the pricing page yourself before you buy — that is true of every price on this page, and doubly true of one the vendor animates.
What Typefully does not do is sit inside X next to a reply box. It is a destination you open to write, not a companion that appears mid-conversation. For creators who plan a week of content at a desk, that is the right shape. For someone who replies opportunistically all day, the round trip — copy the post, open the workspace, draft, copy back — is exactly the friction a reply assistant removes.
Hypefury: the tool that stopped supporting X
The finding that reshaped this page. Hypefury began as an X growth tool and is still recommended that way in roundups. Its own pricing page now answers the question directly, in its FAQ: “Does Hypefury still support 𝕏/Twitter? — Nope! Hypefury no longer supports 𝕏 :(” The same page lists the platforms it does connect, and X is not among them: Bluesky, Threads, LinkedIn, Instagram and TikTok. Its newsletter copy points at the same five.
Everything else about the product is real. It schedules unlimited posts, cross-posts between its supported channels, runs auto-first-comments and an engagement builder aimed at watched users and keywords, and offers an AI trained on your posts. Its current pricing is simple — $6 per month for one channel, $19 per month with all channels included, a 7-day trial, and no free plan. None of it helps if the network you are trying to grow is X.
That is the useful lesson for a buyer: a tool can be excellent, actively developed, and completely wrong for the platform you are reading about it on. The recommendation expired; the product did not. If X is your network, treat every roundup that still lists Hypefury as an X tool as undated until you check it — including this page, which now dates its checks.
What X’s own rules require of whichever tool you pick
Vendor features are one axis; the platform’s rules are the other, and they apply to every product in this comparison. Read the tool you are considering against this table before you compare its price list.
| What the tool does | What X documents | Where that leaves you |
|---|---|---|
| Drafts text that you post | Nothing in the automation rules restricts a person publishing their own words | No documented exposure — the review step is the whole safeguard |
| Publishes a queue you wrote | Automated posting is permitted under conditions; automated liking and automated reply-hiding are prohibited | Keep the queue yours, keep it varied, and keep volume inside the documented daily ceilings |
| Replies on your behalf from keywords | AI reply bots require prior written and explicit approval from X, and replies based on keyword searches alone are not permitted | The riskiest row in the table, and it sits inside the product category rather than at its edge |
| Runs several accounts from one dashboard | The search rules filter accounts logged into a third-party application that updates many accounts with similar or duplicate content | A compliance question and a discoverability one at the same time |
The third row is the one worth reading twice. The requirement is not that AI replies be useful; it is that they carry approval from X itself. A vendor that cannot explain how it satisfies that requirement is passing the risk to your account, and the site’s explainer on the automation rules works through the clause in full.
The permission question nobody asks at checkout
Whichever tool you choose, connecting it grants access to your account rather than merely reading public posts. X groups what a connected app can do into permission sets on its third-party apps and sessions page, and they are worth knowing before you approve a screen rather than after.
| Permission set | What the app can do | What a reply tool actually needs |
|---|---|---|
| Read | View your profile, your posts and how others interact with them, your timeline including protected posts, who you follow, and your Lists | Enough to draft from context — and nothing more |
| Read and write | All of the above, plus posting and deleting for you, engaging on your behalf, and following or unfollowing | The set that can publish without you; understand it before you approve it |
| Read, write and Direct Messages | All of the above, plus sending and reading your Direct Messages | Rarely needed to help someone write a public reply |
| Email address | Viewing the email address on your account — a separate permission, not part of profile information | A marketing surface, not a feature |
Two practical details from the same page. Access is reviewed and revoked in Settings and privacy → Apps and sessions, where every connected app and every active login session is listed; logging out of a session stops further actions from it, though it may not delete data already cached on that device. And X does not share your password with apps — but an authorised app may use, store and share your information under its own policies, which is why the app’s own terms are worth a look. The full permission audit walks the screen step by step.
How to check a recommendation before you buy
The Hypefury case is not unusual; it is just unusually well documented by the vendor. Five checks take about five minutes each and would have caught it.
- Open the vendor’s own pricing or channels page and look for the platform by name. A connected-platforms list is a fact, and it is the fastest fact to read. If your network is not in the list, stop.
- Search the vendor’s help centre and FAQ for the platform name. Discontinuations are usually announced in a support answer rather than on the home page.
- Look for a date on the recommendation you are reading. Most roundups do not carry one. Undated is not the same as current.
- Identify the mechanism, not the feature list. An extension that drafts beside a post box, a scheduler that publishes a queue, and a keyword-fed reply bot live under different parts of X’s rules.
- Re-check the price last. Prices move faster than features and are the easiest claim to verify — the one figure in the previous version of this page we could not confirm was also the one hiding a bigger problem.
Who should choose which
Choose TweetReplier if you actively reply on X from Chrome and want faster, on-voice drafts of replies and posts, with review as the only mode. It pairs with a scheduler if you later need one; our guide to tool categories for X explains that pairing.
Choose Typefully if you publish mostly planned content, threads and multi-network posts across X, LinkedIn and Threads, and you want the best writing-and-calendar experience with a free tier that is genuinely usable at low volume.
Do not choose Hypefury for X. If your bottleneck is cross-posting to Bluesky, Threads, LinkedIn, Instagram and TikTok, it is still a reasonable option at $6–$19 per month — but it is not an X tool, whatever list you found it on.
The full feature matrix with more tools (Tweet Hunter, Postwise, ReplyGuy, SuperReply and others) is on our honest comparison page; the reply-only trio gets a focused three-way breakdown. The documentation covers what TweetReplier does in depth.
Bottom line
Every week someone buys a scheduler to write better replies, or a reply tool to manage a content calendar, and both end up disappointed. Decide which job you are hiring for first, then check the vendor’s own pages for the two facts that go stale fastest: which platforms the tool still connects to, and what it costs. This page dates its checks because the alternative — an undated recommendation — is how a product that left the platform keeps getting sold as an X tool.