Alternatives

Products that do what Flasho- Open source customer notifications for developers does

Hi HN, excited to introduce our open source tool- Flasho. With Flasho, you can set up transactional notifications in minutes, with little to no code, using PostgreSQL triggers. Flasho can be self-hosted (docker/build from source). We support SMS/Email currently. We'll be adding push/in-app soon. Try it out and let us know what you think. Looking forward to your feedback.

1. 1
   Riley▲183

   MailChimp for SMS. Dashboard and API for triggering SMS.

   2018

2. 2AN
   A Node.js open source library to send transactional notifications▲84

   2017 · github.com

3. 3
   Transactional Email Templates by Postmark▲210

   Open source email templates for use in your SaaS app.

   2018

4. 4OA
   Outbound - A single events API for emails, push, sms, and voice▲59

   Empower your product manager. Let them decide what the messages to your users say, when those messages are triggered, as well as how they are sent (sms, email, etc.) while you focus on building product features. They'll be able to use trusted providers like sendgrid, twilio and apple so you don't have to worry about message delivery.

   2013 · outbound.io

5. 5
   MagicPush▲249

   Easy and affordable push notifications for web-apps

   2024

6. 6
   Firetail▲162

   Get push, SMS, and email stock price alerts 🚨 📈

   2017

7. 7
   Pusher Beams▲165

   Hosted API for devs to deliver transactional notifications

   2018

8. 8
   Mailero▲142

   Turn support emails into tickets

   Apr 2026

9. 9
   Listmonk▲322

   Self-hosted newsletter and mailing list manager

   2019

10. 10
    Keep▲108

    Alerting, by developers, for developers

    2023

11. 11ET
    Easy-to-use curl command to send email notifications▲107

    2018 · curlmail.co

12. 12
    Pulse▲90

    Lightweight real-time polls - open source & self-hosted

    Mar 2026

13. 13
    Pico▲128

    Email and payment tools for audience relationship management

    2019

14. 14
    Thunderbird 115 Supernova▲175

    Make email easier

    2023

15. 15
    Mailtrain▲330

    Self hosted newsletter app (Mailchimp clone)

    2016

16. 16
    Quailrunner▲178

    Low-code webhook initiation using your Postgres database

    2024

17. 17
    Truepush - Free Push Notifications▲286

    Feature rich, high volume notifications with deep analytics

    2019

18. 18
    Vero Newsletters▲199

    Faster email marketing with direct SQL access to your data

    2021

19. 19
    Notifo▲130

    Open-source notification server for all channels

    2022

20. 20
    Mailfox▲172

    Never let a missed email cost you money again

    2024

21. 21
    .meteoremails▲107

    Send cold emails for free! Free and open source project

    2020

22. 22
    Crypto Notifications for Metamask▲156

    Telegram & Email notifications for crypto & NFT transactions

    2023

23. 23
    Postscript▲124

    Like Mailchimp for SMS

    2019

24. 24
    ReleaseNotes▲157

    Update your product? Update your customers.

    2020

Ranked by how close each launch is in meaning, then by votes. Refine with a description →