Basin Alternative

Basin's free plan covers 50 submissions a month, and webhooks don't appear until Growth at $24.17/mo — two paid tiers up. For a contact form that only needs to reach your inbox, that's irrelevant. For a form that needs to tell a Slack channel something happened, it's the whole decision.

• •Basin's free tier is 50 submissions/month; webhooks and API access unlock at Growth ($24.17/mo).
• •Formboost's free tier is 500 submissions/month across 10 forms, with Slack, Discord, Telegram and email included.
• •Formboost's custom webhooks start at $9/mo; Basin's at $24.17/mo.
• •Basin has file uploads on every plan and Formboost has none yet, which is the clearest reason to stay.

Basin's pricing page lays out five tiers. The free plan gives you 50 submissions a month with 100 MB of file storage and basic spam filtering. Starter is $12.50/mo for 250 submissions, Growth $24.17/mo for 1,000, Pro $30.62/mo billed annually for 5,000, and Agency $81.25/mo billed annually for 25,000.

Storage and volume scale steadily across those tiers, and file handling is available at every one of them, which is a genuine strength if your forms collect documents.

The catch for developers is placement rather than price: webhooks and API access both unlock at Growth. Starter, despite being a paid plan, doesn't include either. So the ladder for a form that needs to trigger something is free → $12.50 → $24.17, and only the last step actually does it.

Formboost puts the chat destinations on the free plan and starts its paid ladder lower:

Two rows above are worth stating plainly rather than leaving in a table.

Formboost has no file uploads. They're on the roadmap and not shipped. Basin handles files on every plan including the free one. If your form takes a CV, a portfolio or a photo, Basin does something Formboost currently cannot, and that should end the comparison for that form.

Formboost has no account API. The submission endpoint, POST /f/{alias}, is the only public API and it exists to receive posts, not to read them back. Forms, submissions and integrations are managed in the dashboard. Basin's Growth tier gives you an API for querying submissions; Formboost does not have an equivalent at any price today. If your plan involves pulling submissions into your own system on a schedule, that's a real reason to choose Basin.

Anything you read elsewhere about a Formboost REST API for reading submissions — including in an earlier version of this post — was wrong.

The trade Formboost is making is that the things most people wanted a webhook *for* are free:

• •Slack, Discord and Telegram delivery on the free plan, configured with a pasted webhook URL from the destination side.
• •Email notifications on the free plan.
• •500 submissions a month across 10 forms, ten times Basin's free allowance, with no card and no expiry.

When you do need a custom endpoint of your own, Zapier, n8n or Google Sheets, that's Starter at $9/mo — still less than Basin's cheapest paid plan, and well under the $24.17 where Basin's webhooks begin.

Formboost screens everything, but the depth scales with the plan and it's worth being exact:

• •Free runs heuristics: disposable email domains, link floods, honeypot hits, per-endpoint rate limiting.
• •Starter adds an AI model that judges the submissions heuristics can't resolve, reading them against a description of what the form is for.
• •Pro runs that model on every submission rather than only the ambiguous ones.

Every submission carries a score and a readable reason, so a false positive is inspectable rather than mysterious. There's no captcha to configure.

Basin documents basic spam filtering on Free and Starter and advanced filtering on Pro and Agency, alongside honeypot and captcha support. The difference is the model-based layer and where the tiers sit, not that Basin's filtering doesn't work.

The integration is an ordinary HTML form post, so migration is usually a one-attribute edit:

<form action="https://formboost.app/f/YOUR_ALIAS" method="POST">
  <input type="text" name="name" required />
  <input type="email" name="email" required />
  <textarea name="message"></textarea>
  <button type="submit">Send</button>
</form>

Your field names become the column names on the submissions, so existing markup, styling and validation carry over untouched. Posting with fetch instead returns 202 with a JSON body; a plain form post returns a 302 to whatever you set in _redirect.

Before you switch: export your Basin submissions, because Formboost doesn't import them and the export is the step that's hard to undo later. If you can, point a duplicate form at the new endpoint and run both for a few days before cutting over.

The step-by-step version is in the migration guide, and the endpoint's exact request and response shapes are in the API reference.

• •Forms that collect files cannot move yet: Formboost's file uploads are on the roadmap.
• •Forms whose submissions you query from code need a different pattern on Formboost — there is no read API, so use CSV export or a webhook on Starter.
• •Forms that notify a Slack, Discord or Telegram channel are free on Formboost.
• •Forms under 500 submissions a month fit Formboost's free plan; Basin's free plan caps at 50.
• •Forms that need a custom webhook cost $9/mo on Formboost against $24.17/mo on Basin.

Prices on both sides change. These were checked in August 2026 against Basin's pricing page and Formboost's; check both before deciding.