Same starting price. CometX lets you post links and video.
ClimbX and CometX do a similar job: draft from your own posts, schedule them, learn from what worked. As of September 2026 the differences are in the limits and the plans.
Buy CometX if you link to your launches, post video, or run more than three accounts. Creator is $29/mo. You approve every word.
A longer trial (7 days), self-serve checkout with one-click cancel, and a clearly explained method for scoring each post against your own baseline.
Links are allowed. Video is supported. Plans go to 10 and 25 accounts. Every reply to someone else is one you approved.
ClimbX figures below are from its pricing page, public agent skill, and blog as of September 2026. We did not enter the paid app. If they moved a number, the jobs below are still the comparison.
| Job | ClimbX | CometX |
|---|---|---|
| Price | One plan. $29/mo founding price for the first 100 subscribers, then $39/mo. Pricing. | Creator $29/mo, Pro $59/mo, Agency $149/mo. Hard spend ceiling. |
| Accounts | 3 X accounts on the one plan. Pricing. | 3 accounts · 92 posts / mo shared on Creator. 10 on Pro. 25 on Agency. |
| Trial | 7-day trial, card required, charged on day 8. Pricing. | 3-day trial. ClimbX gives you four more days. |
| Checkout and cancel | Self-serve checkout and one-click cancel. Pricing. | Self-serve checkout is not live yet. One-click cancel when it is. |
| Links | A post with any URL is rejected, bare domains included. You add the link yourself as a reply on X. Agent skill. | Links allowed. One click moves a link from the post to the first comment if you want it there. |
| Daily volume | Publishing and scheduling through its API and MCP share a cap of 5 posts a day. Agent skill. | A monthly post allowance shared across your accounts. No separate daily cap. |
| Video | Video is not supported over its API (images only). Agent skill. We did not check the logged-in app. | Video posts, plus a studio for making them. |
| Learning from results | Scores each post against the median of your own surrounding posts and feeds tagged winners into new drafts. It explains that clearly. Method post. | Scores each post against the median of your own neighbouring posts, feeds your winners into the daily batch, and, when your history supports it, notes on the draft which dated post it builds on and its × your median. |
| API and agents | REST API and a hosted MCP server, plus a public agent skill file. Agent skill. | Official X API. REST API and MCP server for your own agents. |
Is ClimbX or CometX cheaper?
At the entry price they match: both start at $29/mo for 3 accounts, as of September 2026. ClimbX’s $29 is a founding price for its first 100 subscribers, then $39. CometX has larger plans at $59 and $149 if you run more accounts.
Can I post links?
On CometX, yes. ClimbX rejects any post containing a URL through its API and asks you to add the link as a reply yourself. CometX lets you choose, and can move the link to the first comment in one click.
Which has the better trial?
ClimbX. Its trial is 7 days with a card on file; CometX’s is 3 days. If you want a week to decide, that is a real difference.
Does CometX auto-send replies or DMs?
No. Nothing sends itself to a stranger. AI drafts; you click send. That is our product rule, not a promise about how X will treat the account.
No signup. Nothing stored. They run in your browser.
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