EmailSpellChecker

Judgement

What it is

Building block

What it does

A tiny TypeScript library that spots likely typos in email domains, such as gmial.com, and suggests corrections.

Adopt it when

Your sign-up forms collect emails and you want fewer bounced addresses.

Ready for

Usable

Runs as

Library

Built with

TypeScript

How established

Established: started 4 years ago, no tagged release yet.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-03 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: EmailSpellChecker → TypeScript → Go → runs on a microchip

How compilers were built, back to punched paper tape

Open-source alternatives to EmailSpellChecker

1. 1
   Listmonk knadh

   High performance, self-hosted, newsletter and mailing list manager with a modern dashboard. Single binary app.

   Complete system Production-ready You send newsletters to large lists and want to pay only for SMTP or SES instead of per-subscriber pricing.

   ★ 24k AGPL-3.0 Go Active, pushed yesterday
2. 2
   BillionMail Billionmail

   BillionMail gives you open-source MailServer, NewsLetter, Email Marketing — fully self-hosted, dev-friendly, and free from monthly fees. Join the discord: https://discord.gg/asfXzBUhZr

   Complete system Usable You want to run your own mail server and campaigns together and know how to manage IP reputation.

   ★ 16k AGPL-3.0 Go Slowing, pushed 5 months ago
3. 3
   Keila pentacent

   Open Source Newsletter Tool.

   Complete system Usable You want a simple self-hosted or EU-hosted alternative to Mailchimp for newsletters.

   ★ 2.3k AGPL-3.0 Elixir Active, pushed 2 days ago
4. 4
   SendPortal mettle

   Open-source self-hosted email marketing. Manage your own newsletters at a fraction of the cost.

   Complete system Usable You want cheap newsletter sending on your own server and already use a transactional email provider.

   ★ 2.2k MIT PHP Active, pushed 11 days ago
5. 5
   MailAccess KatrielMoses

   Free email OSINT tool, 5000+ platforms, identity clustering, breach detection. No API keys required. pip install mailaccess

   ★ 1.7k MIT Python Active, pushed 6 days ago
6. 6
   Framework maizzle

   The modern email development framework.

   Framework or platform Production-ready Developers who know Tailwind want to code email templates in a build pipeline.

   ★ 1.6k MIT TypeScript Active, pushed 8 days ago
7. 7
   MailCheap marclou

   Newsletters where you pay for the emails you send, not for dormant subscribers, at a fraction of the price of beehiiv and the like. Open source: self-host it, or use mailcheap.ai.

   Complete system Experimental A newsletter with many inactive subscribers wants to cut costs compared with beehiiv or Mailchimp.

   ★ 1.4k AGPL-3.0 JavaScript Active, pushed 9 days ago
8. 8
   Email Templates ColorlibHQ

   Free HTML email templates for Mailchimp and other emails services

   Template or starter Usable You need a decent-looking email layout quickly and do not want to design from scratch.

   ★ 1.2k MIT HTML Active, pushed 2 months ago

Commercial email marketing and newsletter software

1. 1
   Substack Substack Inc.

   American online newsletter platform

   Complete system Production-ready A writer wants to start a free or paid newsletter at no upfront cost and benefit from Substack's discovery network.

   25k readers a month Since 2017 Commercial
2. 2
   Mailchimp Intuit

   Utilize real-time user behavior data and artificial intelligence to convert more customers. Easy to use, get started for free!

   Complete system Production-ready A small business or nonprofit wants a familiar email newsletter tool with lots of templates.

   1k readers a month Since 2001 Commercial
3. 3
   Klaviyo Klaviyo

   Klaviyo unifies marketing and service with its AI-first B2C CRM. Try our omnichannel marketing software, powered by K:AI agents to deliver personalised experiences across email marketing, WhatsApp and more.

   Complete system Production-ready A Shopify or other online store wants purchase-driven email and SMS marketing.

   839 readers a month Since 2012 Commercial
4. 4
   Constant Contact Constant Contact

   With Constant Contact, you can create effective email marketing and online marketing campaigns to meet your business goals. Start your FREE trial today!

   Complete system Production-ready A local small business or nonprofit wants simple email newsletters and values phone support.

   286 readers a month Since 1995 Commercial
5. 5
   Brevo Brevo

   Brevo is the most intuitive all-in-one customer engagement platform: email and SMS marketing, automation, CRM, live chat, and transactional email. Try it free.

   Complete system Production-ready A small business, especially in Europe, has a large contact list but sends infrequently.

   208 readers a month Since 2012 Commercial
6. 6
   ActiveCampaign ActiveCampaign

   Go beyond marketing automation with ActiveCampaign's autonomous marketing platform. Your team of AI agents handles email, SMS, WhatsApp and more for you, backed by billions of data points.

   Complete system Production-ready A small or midsize business wants sophisticated email automation at a price below HubSpot.

   68 readers a month Since 2003 Commercial