What is the best AI tool to write X threads?
The best AI tool for writing X threads is Typefully if you write the thread yourself and want help with it: its Writing Assistant suggests stronger hooks and endings, improves thread structure, and learns your style from your writing samples. Tweet Hunter is the stronger pick for growth on X alone, with AI-written tweets, thread ideas, and automation. Buffer schedules X threads on every plan, Free included.
Cadencz is the pick for founders whose threads are about their product: it drafts X posts from the product context stored in its Brain and holds them for approval. Hypefury, often named in older lists, no longer supports X according to its own pricing page.
AI tools for X threads compared
| Tool | Thread writing help | Schedules X threads | AI | Starting price | Best for |
|---|---|---|---|---|---|
| Typefully | Writing Assistant improves thread structure, hooks, and endings | Schedules to X and four other text networks | Writing Assistant on all plans; learns your style | See pricing page | Writing threads yourself, with help |
| Tweet Hunter | Thread ideas and hooks on Grow | Yes, tweet and thread scheduling on every plan | AI-written tweets and rewrites on Grow | Discover $29/mo; 7-day trial | Growth on X alone |
| Buffer | Standard composer | Yes, X threads on all plans, Free included | AI Assistant on every plan | Free (3 channels, 10 scheduled posts each) | Threads as one part of a multi-channel queue |
| Postiz | Not stated on pricing page | Not confirmed on pricing page | AI copilot on every hosted plan | Standard $29/mo hosted; open source | Self-hosting, API, and agents |
| Cadencz | Writes X-native drafts from your product context; not a dedicated thread editor | Schedules X posts after approval | Plan My Week and per-channel drafts | Free (15 X posts/mo); Starter $19/mo | Founders whose threads are about the product |
| Hypefury | Not applicable | No; its FAQ says it no longer supports X | "AI trained on your posts" on Full | Flexible $6/mo; Full $19/mo | Bluesky, Threads, and LinkedIn, not X |
How to judge a thread tool
Thread tools look alike in a demo. These are the questions that separate them once you post every week.
- Does it publish the whole thread, or only the first post? A thread is a series of connected posts, which X's own help page describes; a tool should post them in order as replies, not as separate posts.
- How does it pay for X? Publishing through X's API is paid, so tools ration it. Cadencz counts X posts per month (15 on Free, 40 on Starter, 100 on Pro); Publer's free plan excludes X; Metricool sells X as an add-on.
- How does it treat links? Cadencz's pricing page states that X bills 13 times more for a post containing a link, so a link post spends 13 of your monthly X posts. Put the link where it matters, usually once, near the end.
- Does the AI know your subject? A tool that only sees your prompt writes generic threads. One that reads your past posts or your product writes specific ones.
- Can you approve before it posts? A thread that goes out with a wrong number in post four is hard to fix quietly.
Typefully: best for writing threads yourself
Best for: writers who draft threads by hand and want an assistant that improves them.
Typefully publishes to X, LinkedIn, Threads, Bluesky, Mastodon, and Instagram. Its Writing Assistant is included on all plans: it suggests stronger hooks and endings, improves thread structure, adapts posts across platforms, and learns your style from samples you add. Free users get a small allowance; paid plans get higher limits. Plan prices did not render on its pricing page today, so see the pricing page.
Tweet Hunter: best for growth on X alone
Best for: people whose whole presence is X and who want AI plus automation.
Discover is $29 a month for 1 X account, with tweet and thread scheduling and evergreen tweets. Grow is $49 a month for 5 accounts and adds AI-written tweets, rewriting, and thread ideas and hooks. Each plan has a 7-day free trial. It covers X only.
Buffer: best for scheduling threads on a free plan
Best for: scheduling an occasional thread alongside other channels without paying.
Buffer's help center lists X threads as available on all plans. The free plan connects 3 channels with 10 scheduled posts each and includes the AI Assistant; Essentials starts at $5 per channel per month. The AI helps with wording; it is not a thread-specific writer.
Postiz: best for open source and agents
Best for: technical teams who want to self-host or post through an API or AI agent.
Postiz is open source with a hosted cloud. Hosted Standard is $29 a month for 5 channels with unlimited posts, an AI copilot, an MCP server, a public API, and webhooks. Its pricing page lists X among supported networks but does not mention thread posting, so test a thread on the 7-day trial before relying on it.
Cadencz: best for threads about your own product
Best for: founders who post on X about what they are building and also publish to other channels.
Cadencz drafts X posts from the product context in its Brain and writes a separate version for each other channel, so an X explainer and a LinkedIn post come from the same facts without being copies. Every post waits for approval. Free includes 15 X posts a month on one handle, Starter 40, and Pro 100, with a link post spending 13 of them. It publishes to Bluesky, X, LinkedIn, Threads, Mastodon, Telegram, Discord, Slack, and dev.to.
Hypefury: no longer an X tool
Best for: creators on Bluesky, Threads, LinkedIn, and Instagram, not X.
Hypefury's pricing FAQ answers "Does Hypefury still support X/Twitter?" with "Hypefury no longer supports X." Full is $19 a month with Bluesky, Threads, LinkedIn, Instagram, and TikTok. If you found it on an older list of thread tools, check that answer before you sign up.
Frequently asked questions
- What is the best AI tool to write X threads? Typefully, if you write threads yourself and want help with hooks and structure. Tweet Hunter is better for growth on X alone, and Cadencz suits founders whose threads are about their own product.
- Can I schedule an X thread in advance? Yes. Buffer lists X threads on all plans, Free included, and Tweet Hunter includes tweet and thread scheduling on every plan. Hypefury no longer supports X.
- Are there free tools for writing X threads? Buffer Free schedules X threads and includes its AI Assistant, Typefully gives free users a small Writing Assistant allowance, and Cadencz Free includes 15 X posts a month with 40 AI generations. Postiz is open source if you self-host.
- Can I turn a blog post into an X thread? Yes. Pull out the one claim worth arguing, give each post one step of the argument, and link the article once at the end. The workflow is laid out step by step in the guide on turning one blog post into a month of social content.
- Do X posts with links cost more? On Cadencz, yes: its pricing page states that X bills 13 times more for a post with a link, so one link post spends 13 of your monthly X posts. That is 1 link post a month on Free, up to 3 on Starter, and 7 on Pro.