Dev tools · alternatives · 2026
24 alternatives to Flasho- Open source customer notifications for developers
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.
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Flasho- Open source customer notifications for developers launched in 2023; newer entries below may have overtaken it.
- 1
Riley▲183MailChimp for SMS. Dashboard and API for triggering SMS.
2018 · getrileynow.com · its alternatives →
- 2DA
Hey HN! I’ve written a bunch of WebSocket servers over the years to do simple things like state synchronization, WebRTC signaling, and notifying a client when a backend job was run. I realized that if I had a simple way to create a private, temporary, mini-redis that the client could talk to directly, it would save a lot of time. So we created DriftDB. In addition to the open source server that you can run yourself, we also provide https://jamsocket.live where you can use an instance we host on Cloudflare’s edge (~13ms round trip latency from my home in NY). You may have seen my…
2023 · driftdb.com · its alternatives →
- 3
The <Inbox /> infrastructure for modern products. Novu has 98 repositories available. Follow their code on GitHub.
2023 · github.com · its alternatives →
- 4
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MagicPush▲249Easy and affordable push notifications for web-apps
2024 · getmagicpush.com · its alternatives →
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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 · its alternatives →
- 11
Pulse▲90Lightweight real-time polls - open source & self-hosted
Mar 2026 · demo.pulse.kartikeybhardwaj.com · its alternatives →
- 12
Pico▲128Email and payment tools for audience relationship management
2019 · trypico.com · its alternatives →
- 13
- 14ET
2018 · curlmail.co · its alternatives →
- 15
Quailrunner▲178Low-code webhook initiation using your Postgres database
2024 · quailrunner.com · its alternatives →
- 16
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Everything you need to start sending newsletters, drip campaigns, transactional emails. Mailcoach is a fully featured email marketing platform built for growing creators, developers, and businesses.
2020 · mailcoach.app · its alternatives →
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MailCue▲82Run as a fully hardened production email server.
Apr 2026 · olib-ai.github.io · its alternatives →
- 20
.meteoremails▲107Send cold emails for free! Free and open source project
2020 · tempmailo.co · its alternatives →
- 21
Introducing Posthorn, a self hosted email gateway. One docker container (or Go binary) between every self hosted app on your VPS and your transactional email provider. Set up Posthorn once, point your apps to it, done. I was trying to deploy Ghost on a DigitalOcean droplet and found that DO and many different VPS services have started to block the default SMTP ports to try to combat the various types of abuse they get. To actually configure my app, I had to hack together a Postfix relay. In another project, I had a static site which had a contact form, but my free Formspree account was…
May 2026 · github.com · its alternatives →
- 22
Tantl▲91Build event notifications and alerts on top of your data
2022 · bytebot.ai · its alternatives →
- 23
A Node.js library to send all kinds of transactional notifications. - notifme/notifme-sdk
2017 · github.com · its alternatives →
- 24
Notif.me SDK▲92A Node.js lib to send all your transactional notifications
2017 · github.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →