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Top 10 open-source SaaS that could help you build the next big thing

Alex Barashkov
Software engineer with 10+ years of web development experience. Currently focused on React, Next.js, Gatsby.
・3 min read

I'm super happy that investors and big companies are finally happy to support Open Source projects. It was hard to imagine 10 years ago that there will be plenty of SaaS built based on open-source model.

Here is the list of my favourites that could help you build amazing modern architecture covering different aspects of product development and architecture.

Hasura

GitHub logo hasura / graphql-engine

Blazing fast, instant realtime GraphQL APIs on your DB with fine grained access control, also trigger webhooks on database events.

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Hasura simplifies the development a lot. How do you usually build your apps? Probably you choose some framework, set up ORM, set up DB, write manually migrations, then you build batch of CRUD endpoints either with REST or Graphql, add authorization layer.

With Hasura you can:

  • easily create most of your tables for PostgreSQL, TimescaleDB, MySQL, MongoDB, MSSQL using nice UI
  • every DB structure modification will be recorded as a migration(so you can easily run it within your CI by using Hasura CLI)
  • each table will automatically get relevant graphql/rest endpoints
  • protect each endpoint by a powerful set of rules for each user role
  • and if you need more business logic you can merge generated endpoints with custom graphql server

TimescaleDB

GitHub logo timescale / timescaledb

An open-source time-series SQL database optimized for fast ingest and complex queries. Packaged as a PostgreSQL extension.

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An extension for PostgreSQL that boost the performance of time-series operations. Super simple to use, amazing documentation and nice cloud service. You can always use it as a replacement of PostgreSQL because it does not have any downsides, but in case you start saving some metrics, stats to your database you will be covered. It has 10x-100x faster queries than PostgreSQL for time-series.

Supertokens

GitHub logo supertokens / supertokens-core

Open source alternative to Auth0 / Firebase Auth / AWS Cognito

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Every project needs authorization. If you used Auth0, it's pretty much the same but it's Open Source, so you can easily host it within your own infrastructure or either use cloud version. It works based on JWT, so simply integrates with Hasura.

n8n

GitHub logo n8n-io / n8n

Free and open fair-code licensed node based Workflow Automation Tool. Easily automate tasks across different services.

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Don't want to bother yourself with programming automation between different services and spending hours on that? Try n8n. Powerful UI to design different integrations and automations that rely on data changes/triggers.

Rancher

GitHub logo rancher / rancher

Complete container management platform

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Modern applications deserve modern infrastructure and managing it could be a painful process. Rancher simplifies management of Kubernetes clusters whether you run it in the cloud or on bare-metal servers.

Drone CI

GitHub logo drone / drone

Drone is a Container-Native, Continuous Delivery Platform

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Despite Github actions and Gitlab are very popular solutions, Drone CI has fantastic architecture and a very simple set-up. After it's been acquired by Harness, it's got a major 2.0.0 update that brought a lot of cool features such as activity charts, user management, new UI. Drone CI is a very powerful and flexible tool.

Grafana

GitHub logo grafana / grafana

The open and composable observability and data visualization platform. Visualize metrics, logs, and traces from multiple sources like Prometheus, Loki, Elasticsearch, InfluxDB, Postgres and many more.

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You can't build the next big thing without having a proper monitoring analytics solution. Grafana was an essential tool in that space for a very long time, and now they also have a cloud version.

K6

GitHub logo grafana / k6

A modern load testing tool, using Go and JavaScript - https://k6.io

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The best performance testing tool and it's open source. Recently K6 has been acquired by Grafana Labs, so I'm sure it will become even better. If you had experience writing scripts for jMeter, K6 experience will be 100x times better.

Sentry

GitHub logo getsentry / sentry

Sentry is cross-platform application monitoring, with a focus on error reporting.

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Error reporting is crucial when you want to handle customer issues before it will have a negative impact on your business. Sentry allows you to simply integrate their SDK in your framework/language and start to receive alerts when errors happen either on the client or server-side.

Flagsmith

GitHub logo Flagsmith / flagsmith

Feature flagging and remote config service. Host yourself or use our hosted version at https://flagsmith.com/

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In 2021 you should stop pushing major updates to all users at the same time. Control their expectations and react to issues predictively by using feature flags. Simply integrate it with your framework by using SDK, then manage who should be allowed to have access to certain features.

Summary

Building projects with open source technologies is amazing, since you don't need to spend a fortune to test things, but as projects grow you always could try paid cloud versions.

What open source SaaS do you use in your project?

Discussion (9)

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ivanjeremic profile image
Ivan Jeremic

MongoDB Realm, Supabase.

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alex_barashkov profile image
Alex Barashkov Author

I have not tried Supabase yet. It looks like it's have some functionality of Hasura, but with extra Auth/Storage features.

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ivanjeremic profile image
Ivan Jeremic

Most feature complete is MongoDB Realm

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aravind profile image
Aravind Putrevu

Redis, Confluent's Kafka, Elasticsearch

These too and many many more. You should also join coss.community

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alex_barashkov profile image
Alex Barashkov Author

I did not know about coss.community, thanks for the link.

Redis/Elastic/Kafka are the old guard :) Wanted to focus more on new one and SaaS focused.

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ralexrdz profile image
Raul Rodriguez

Would add UptimeRobot to keep track of up and down statuses of sites

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alex_barashkov profile image
Alex Barashkov Author

is it open source ?

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ralexrdz profile image
Raul Rodriguez

no, but free for 50 urls.

For a opensource one, I use (Cabot)[github.com/arachnys/cabot]

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vladi160 profile image
vladi160

Supabase - supabase.io/