Basin alternative: same HTML form, one new URL

The most common trigger is the locked API. Basin's API is enterprise-only, which means standard plans can't programmatically fetch submissions, build a custom integration, or drive automation from form data. splitforms' read API is open on every plan including free — fetch submissions, sync to your database, and drive an AI agent; paid delivery features start on Pro ($5/month).

The second trigger is the free-tier ceiling. Basin's listed free tier caps at 50 submissions/month, which is enough for a personal site but not for a small business. splitforms gives you 500 free submissions with a real dashboard and email notifications; Pro adds signed webhooks and file uploads for $5/month.

The third trigger is webhook gating. Basin's free tier doesn't include webhooks; you need to upgrade to wire form submissions into anything else. splitforms unlocks HMAC-SHA256 signed webhooks (one retry after ~2s on network errors, timeouts and 5xx; not on 4xx; 8-second timeout) on Pro for $5/month.

Free tier

splitforms 500 submissions total and unlimited forms; Basin's listed Free plan is 50 submissions/month and 1 endpoint. splitforms includes the dashboard and email notifications on Free, while paid plans add webhooks and file uploads.

API

splitforms ships an open REST API and MCP server on every plan. Basin's API is locked behind enterprise contracts.

Webhooks

splitforms unlocks HMAC-SHA256 signed webhooks (one retry after ~2s on network errors, timeouts and 5xx; not on 4xx; 8-second timeout) on paid plans. Basin gates webhooks to paid tiers.

Spam protection

splitforms uses smart spam filtering (rule-based scoring of links, spam phrases, disposable addresses and suspicious domains) on top of a honeypot and a time-trap, and keeps what it flags in a Spam folder you can review. Basin uses Akismet, which was built for blog-comment spam.

Slack

Basin has first-class Slack routing in the UI. splitforms drives Slack via webhook — one extra step to configure, identical end result.

UI

Basin's dashboard is tuned for non-technical operators. splitforms' dashboard is tuned for developers and operators who want fast inspection.

• “I want to programmatically pull my submissions and Basin's API is enterprise-only.”

  splitforms' API is open on every plan including free.

• “I need webhooks but I'm on a tiny budget.”

  splitforms unlocks HMAC-SHA256 signed webhooks (one retry after ~2s on network errors, timeouts and 5xx; not on 4xx; 8-second timeout) on Pro at $5/month.

• “My free tier ran out at 50 submissions and I'm not ready to pay yet.”

  splitforms' free tier covers 500 submissions total with dashboard storage and spam filtering.

• “Akismet is missing the AI-generated spam I'm getting now.”

  splitforms uses smart spam filtering: automatic, rule-based scoring of content signals such as links, spam phrases and disposable email addresses.

• “I want to expose form submissions to a Claude or Cursor agent.”

  splitforms ships an MCP server natively.

splitforms is built for the developer who's the one wiring the form into the broader stack. The dashboard is functional — search, filter, export — but the real value is in the API surface and the integration story.

Open REST API on every plan: fetch submissions, list forms, manage webhooks, all from your own code. No enterprise contract required.

MCP server for AI agents: Claude, Cursor, and other MCP-aware tools can read and act on form data natively. No custom integration code needed.

HMAC-SHA256 signed webhooks on paid plans: every payload carries an `sha256=`-prefixed signature header your receiver can verify, each webhook is scoped to a single form, and each delivery has an 8-second timeout with one automatic retry on network errors, timeouts and 5xx responses — the free webhook tester at splitforms.com/webhook-tester lets you inspect the exact payload before you go live.

Automatic spam scoring: rule-based checks on links, spam phrases, disposable addresses and suspicious domains, plus a honeypot and a time-trap, so many forms can run without a CAPTCHA.

Annual plan: $49/year for 15,000 submissions/month with every Pro feature (about $4.08/month), with no monthly billing.

Step 1: get a free splitforms access key (no credit card). Step 2: change your form's action from `https://usebasin.com/f/YOUR_ID` to `https://splitforms.com/api/submit`. Step 3: test a submission and confirm it lands in the dashboard.

Basin's spam settings, redirect URLs, and CC recipients have direct equivalents in the splitforms dashboard. Slack workflows transfer cleanly: paste your Slack incoming-webhook URL into the splitforms webhook setting and submissions route to your channel exactly as they did from Basin. If you've been using Akismet for spam, splitforms' smart spam filter covers the same job and catches modern AI-generated spam Akismet misses.

Day 1, minute zero: `grep -r 'usebasin.com' .` across your project. Most Basin setups put the action URL directly in the form HTML, so you'll find one or two `action="https://usebasin.com/f/abc123"` lines in `app/contact/page.tsx`, `components/ContactForm.tsx`, or wherever your form lives. Open a `splitforms-migration` branch, swap each URL for `https://splitforms.com/api/submit`, and add the new env var to `.env.local` plus your hosting platform's env (Vercel, Cloudflare, your Kubernetes secrets — wherever production runs). If you've been driving Slack notifications through Basin's first-class Slack integration, copy the Slack incoming-webhook URL from your Slack app's settings — you'll paste it into splitforms's webhook config in a moment.

Minute fifteen: deploy a preview branch. Submit a real test entry from the preview URL, watch it appear in the splitforms dashboard, then go to splitforms's webhooks tab and paste the Slack incoming-webhook URL there. Submit again — the message should land in your Slack channel within seconds. Now run shadow mode: in your form handler, fire `Promise.allSettled([basinPost, splitformsPost])` so both backends receive every submission for 24 hours. This is also the moment to compare spam filtering — splitforms's smart spam filter will flag a different mix of submissions than Basin's Akismet, and shadow mode lets you eyeball both lists side-by-side before committing.

Day 2: remove the Basin `fetch` call, redeploy, monitor for another 24 hours. Once the splitforms-only path has run clean, archive the Basin form from their dashboard and cancel the subscription. The whole window costs nothing for dashboard validation — splitforms's free tier (500 submissions total, unlimited forms) covers the shadow-mode capture for any small-to-mid traffic site, and Pro adds webhooks for $5/month if you need downstream delivery during the trial.

Is splitforms a viable Basin alternative? Yes. Every core capability — POST endpoint, dashboard, spam filtering, custom redirects, CC recipients, Slack notifications — is covered, with an open API on every plan and webhooks on paid plans.

Does splitforms have a Basin-style Slack integration? Yes, via webhook. Paste your Slack incoming-webhook URL into the splitforms dashboard and submissions route to your channel.

What about Akismet for spam? splitforms uses smart spam filtering instead: rule-based scoring of links, spam phrases, disposable addresses and suspicious domains, on top of a honeypot and a time-trap. Flagged submissions wait in a Spam folder you can review.

Can I access my submissions via API? Yes, on every plan including free. splitforms' API is open by default.

Is there a yearly plan? Yes. Annual is $49/year for 15,000 submissions/month with every Pro feature, about $4.08/month.

Is there a per-form limit? No. Every plan — Free, Pro and Annual — includes unlimited forms.