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Documentation Index

Fetch the complete documentation index at: https://doc.spike.ac/docs/llms.txt

Use this file to discover all available pages before exploring further.

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Overview

Both Spike and Formspree are form backend services that let you add forms to any website without writing server-side code. Here’s how they compare.

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Free Plan Comparison

FeatureSpike (Free)Formspree (Free)
SubmissionsUnlimited50/month
FormsUnlimited1
File uploads✅❌
Spam protection✅ Honeypot, reCAPTCHA, hCaptcha, Turnstile✅ reCAPTCHA only
Email notifications✅✅
Custom redirects✅✅
API access✅❌
Webhooks✅❌

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Why Choose Spike

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Unlimited Submissions

Formspree’s free plan caps you at 50 submissions per month on a single form. Spike gives you unlimited submissions and unlimited forms on the free plan.

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More Spam Protection Options

Formspree supports reCAPTCHA on the free plan. Spike supports honeypot fields, reCAPTCHA v2/v3, hCaptcha, Cloudflare Turnstile, ML-based filtering, blocklists, and work email validation.

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File Uploads

Spike supports file uploads on the free plan. Formspree requires a paid plan for file uploads.

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API Access

Spike gives you full API access to your forms and submissions on the free plan. Formspree restricts API access to paid plans.

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Integrations

Spike offers 21+ integrations including Slack, Discord, Google Sheets, Notion, Airtable, and more. Formspree’s integrations are limited on the free plan.

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When Formspree Might Be Better

  • If you only need a single form with very low volume
  • If you’re already invested in Formspree’s React library ecosystem

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Quick Setup Comparison

Both services work the same way — point your form’s action to their endpoint: Spike: 
<form action="https://api.spike.ac/f/YOUR_FORM_SLUG" method="POST">
  <input type="email" name="email" required>
  <textarea name="message" required></textarea>
  <button type="submit">Send</button>
</form>
Formspree: 
<form action="https://formspree.io/f/YOUR_FORM_ID" method="POST">
  <input type="email" name="email" required>
  <textarea name="message" required></textarea>
  <button type="submit">Send</button>
</form>
The setup is nearly identical — switching from Formspree to Spike is just a URL change.