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Open Source Alternatives

List of open-source alternatives to everyday SaaS products.

btw-so/open-source-alternatives
Open GitHub
List stars
8,734
README repos
146
Indexed repos
145
List commits
59
Forks
365
Open issues
47

Tracked list growth

GitHub stars and default-branch commits for btw-so/open-source-alternatives.

Latest scan 2026-09-03 10:49

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Indexed repositories

10 repos matching these filters.

Language: Go
Latest repo push 2026-09-04

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prometheus/prometheus

The Prometheus monitoring system and time series database.

AI dev
Stack
Go Cobra gRPC Go React Vite Go modules npm pnpm
GitHub topics
#alerting #graphing #hacktoberfest #metrics #monitoring #prometheus
Updated
2026-08-03
Lists
5 list mentions
First commit
2012-11-24
License
Apache-2.0
Issues
899 open
Sign in to like prometheus/prometheus
65,527
stars
Forks
10,738
Commits
18,207 commits
Star growth, last 7 days
No 7-day history
Commit velocity, last 7 days
No 7-day history
Website GitHub
milvus-io/milvus

Milvus is a high-performance, cloud-native vector database built for scalable vector ANN search

AI dev
Stack
Go Axum Cobra Gin gRPC Go Cargo CMake Conan
GitHub topics
#anns #cloud-native #diskann #distributed #embedding-database #embedding-similarity
Updated
2026-09-04
Lists
8 list mentions
First commit
2019-03-18
License
Apache-2.0
Issues
1,320 open
Sign in to like milvus-io/milvus
45,963
stars
Forks
4,223
Commits
25,502 commits
Star growth, last 7 days
+106 +0.2%
Commit velocity, last 7 days
+49 +0.2%
Website GitHub
knadh/listmonk

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

Stack
Go React Vite Vue Go modules pip Yarn
GitHub topics
#campaign #campaign-management #email-marketing #email-subscription #listmonk #mailing-list
Updated
2026-09-03
Lists
3 list mentions
First commit
2018-10-25
License
AGPL-3.0
Issues
117 open
Sign in to like knadh/listmonk
23,249
stars
Forks
2,579
Commits
2,027 commits
Star growth, last 7 days
+86 +0.4%
Commit velocity, last 7 days
0 0.0%
Website GitHub
weaviate/weaviate

Weaviate is an open-source vector database that stores both objects and vectors, allowing for the combination of vector search with structured filtering with the fault tolerance and scalability of a cloud-native database​.

AI dev
Stack
Go Cobra gRPC Go pytest Go modules PEP 517 pip
GitHub topics
#approximate-nearest-neighbor-search #generative-search #grpc #hnsw #hybrid-search #image-search
Updated
2026-08-22
Lists
4 list mentions
First commit
2016-03-30
License
BSD-3-Clause
Issues
695 open
Sign in to like weaviate/weaviate
16,745
stars
Forks
1,374
Commits
28,703 commits
Star growth, last 7 days
No 7-day history
Commit velocity, last 7 days
No 7-day history
Website GitHub
gotify/server

A simple server for sending and receiving messages in real-time per WebSocket. (Includes a sleek web-ui)

Stack
Go Gin React Vite Go modules npm Yarn
GitHub topics
#api #cloud #free-software #golang #gotify #hosting
Updated
2026-08-06
Lists
3 list mentions
First commit
2018-01-19
License
NOASSERTION
Issues
86 open
Sign in to like gotify/server
15,649
stars
Forks
856
Commits
924 commits
Star growth, last 7 days
No 7-day history
Commit velocity, last 7 days
No 7-day history
Website GitHub
getlago/lago

Open Source Metering and Usage Based Billing API ⭐️ Consumption tracking, Subscription management, Pricing iterations, Payment orchestration & Revenue analytics

AI dev
Stack
Go Go modules
GitHub topics
#analytics #billing #clickhouse #events #fintech #go
Updated
2026-07-27
Lists
4 list mentions
First commit
2022-02-28
License
AGPL-3.0
Issues
24 open
Sign in to like getlago/lago
10,282
stars
Forks
712
Commits
746 commits
Star growth, last 7 days
No 7-day history
Commit velocity, last 7 days
No 7-day history
Website GitHub
writefreely/writefreely

A clean, Markdown-based publishing platform made for writers. Write together and build a community.

Stack
Go Go modules npm
GitHub topics
#activitypub #beta #blogging #federation #go #markdown
Updated
2026-08-07
Lists
3 list mentions
First commit
2016-09-04
License
AGPL-3.0
Issues
110 open
Sign in to like writefreely/writefreely
5,216
stars
Forks
385
Commits
1,957 commits
Star growth, last 7 days
No 7-day history
Commit velocity, last 7 days
No 7-day history
Website GitHub
openflagr/flagr

Flagr is a feature flagging, A/B testing and dynamic configuration microservice

AI dev
Stack
Go gRPC Go Svelte Vite Vue Go modules npm
GitHub topics
#ab-testing #dynamic-configuration #feature-flags #feature-toggles #golang #swagger
Updated
2026-09-01
Lists
1 list mention
First commit
2017-10-02
License
Apache-2.0
Issues
1 open
Sign in to like openflagr/flagr
2,606
stars
Forks
204
Commits
882 commits
Star growth, last 7 days
0 0.0%
Commit velocity, last 7 days
0 0.0%
Website GitHub