Listed alphabetically. A tool is ranked by its reviews once it has 3.
| Tool | Reviews | Lowest paid plan | Free plan | Free trial | Public API | Runs on | Main features |
|---|---|---|---|---|---|---|---|
 AppcuesAn AI-powered customer engagement platform that triggers in-app, email, and push experiences. | ReviewsNone yetWrite one for Appcues | Lowest paid planSee plans | Free planNot confirmed | Free trialNot confirmed | Public APIYes | Runs onNot confirmed | Main features
|
 ChameleonChameleon learns how people use your product and creates personalized in-app guidance for each user. | ReviewsNone yetWrite one for Chameleon | Lowest paid plan$279Startup, as of November 13, 2026 | Free planNot confirmed | Free trialNot confirmed | Public APIYes | Runs onNot confirmed | |
 MagicBellSend notifications to email, mobile push, web push, Slack, and SMS through a single API. | ReviewsNone yetWrite one for MagicBell | Lowest paid plan$249per monthStartup, as of November 14, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | ||
 NovuOpen-source infrastructure to notify your users and let your agents talk with them. | ReviewsNone yetWrite one for Novu | Lowest paid plan$30per month, starting fromPro, as of November 13, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | ||
 PendoPendo feeds product context to the apps and AI agents you build or buy. | ReviewsNone yetWrite one for Pendo | Lowest paid planNot confirmed | Free planYes | Free trial30 days | Public APIYes | ||
 UserpilotAn AI-powered, no-code product growth platform to onboard users, drive feature adoption and boost retention. | ReviewsNone yetWrite one for Userpilot | Lowest paid plan$299per monthStarter, as of November 13, 2026 | Free planNot confirmed | Free trial14 days | Public APIYes |
From each tool's own website. “Not confirmed” means we couldn't confirm it there, not that the tool doesn't have it. Each tool's page says when its facts were checked.
How this list is made
A tool is listed here only when we've confirmed on its own website that it has a public API. Tools we couldn't confirm it for are left out, even if they may have it. Vendors can't pay for a place on this list. Add a tool we missed