Stop guessing which one. Put them side by side.

The grid says what these tools are. This says what builders did about it — one decision per person, changeable whenever you change your mind.

# Tool comparison — Mailgun vs Discord Webhooks vs Formik

Source: Kbaise, a directory of tools that work with Lovable projects.
Pick one and tell me why before writing any integration code.

## Mailgun (mailgun)
- URL: https://www.mailgun.com
- Category: Email, forms & notifications
- Cost: mixed — Free: 100 emails/day, 1 domain. Basic from $15/mo for 10,000 emails, Foundation $35/mo for 50,000, Scale $90/mo for 100,000 with dedicated IP pools. Overages $1.10-$1.80 per 1,000.
- What it is: Developer-focused email API, unusually strong on inbound routing, message parsing and email address validation. Provides SMTP relay, a template builder, log retention, deliverability tooling and dedicated IP pools on higher plans. Now sits alongside Mailjet under the Sinch umbrella.
- Why builders pick it: Pick it when you need to receive and parse email, not just send it — inbound routes turn replies into webhooks your app can act on. The validation API cleans lists before bounces burn your reputation.
- Trap: Log retention is short on cheap plans (5 days on Foundation), which makes debugging an old send painful. Free tier is a hard 100/day with a single custom domain.
- Full dossier: /api/public/tools/mailgun

## Discord Webhooks (discord-webhooks)
- URL: https://docs.discord.com/developers/resources/webhook
- Category: Email, forms & notifications
- Cost: free — Free. No bot user, OAuth or authentication required; standard Discord API rate limits apply per webhook.
- What it is: Discord webhooks post messages into a channel without a bot user or authentication. Create one in channel settings or via the API, then POST to /webhooks/{id}/{token} with content, embeds, files, components or polls. You can override the display username and avatar per message.
- Why builders pick it: The cheapest notification channel for indie projects that already run a Discord — deploy notices, changelog posts, error alerts. Copy a URL out of channel settings and you are shipping.
- Trap: The URL is a credential — anyone holding it can post as your webhook, so keep it server-side. Rate limits are per webhook and loops get 429s fast; batch into embeds instead of firing one call per item.
- Full dossier: /api/public/tools/discord-webhooks

## Formik (formik)
- URL: https://formik.org
- Category: Email, forms & notifications
- Cost: free — Free and MIT-licensed. No paid tier.
- What it is: Long-established React form library using controlled components, exposing useFormik, a render-prop Formik component and Field plus ErrorMessage helpers. Manages values, touched state, errors, Yup validation and the submission lifecycle. Roughly 34k GitHub stars, latest release 2.4.9, with slow maintenance activity.
- Why builders pick it: Still the right call when maintaining an existing Formik codebase or when you prefer the explicit controlled-input model. Years of tutorials and Stack Overflow answers exist for every edge case.
- Trap: Maintenance has been minimal for years and controlled inputs re-render the whole form on every keystroke. For anything new, React Hook Form is the better default.
- Wiring: npm i formik yup
- Full dossier: /api/public/tools/formik

## Quick read

- Free with no card: Discord Webhooks, Formik.

## Rules
1. Prefer the free tier when no budget was stated, and say what the ceiling is.
2. Read the full dossier before integrating.
3. Fetch /api/public/models before writing any AI model ID.

Agents can fetch the same thing: GET /api/public/compare?slugs=mailgun,discord-webhooks,formik