Dev tools · alternatives · 2026

24 alternatives to Ovlt – Lightweight Auth Server That Runs in ~20MB RAM

Self-hosted OAuth2 + OIDC auth infrastructure in Rust. Multi-tenant PostgreSQL RLS, WebAuthn passkeys, per-tenant SMTP, AES-256-GCM field-level encryption, <50MB RAM.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1. 1
   Stack Auth (YC S24)▲424

   Open-source Auth0/Clerk alternative

   2024 · hexclave.com · its alternatives →

2. 2
   LocalGPT – A local-first AI assistant in Rust with persistent memory▲331

   I built LocalGPT over 4 nights as a Rust reimagining of the OpenClaw assistant pattern (markdown-based persistent memory, autonomous heartbeat tasks, skills system). It compiles to a single ~27MB binary — no Node.js, Docker, or Python required. Key features: - Persistent memory via markdown files (MEMORY, HEARTBEAT, SOUL markdown files) — compatible with OpenClaw's format - Full-text search (SQLite FTS5) + semantic search (local embeddings, no API key needed) - Autonomous heartbeat runner that checks tasks on a configurable interval - CLI + web interface + desktop GUI - Multi-provider:…

   Feb 2026 · github.com · its alternatives →

3. 3
   Obligator – An OpenID Connect server for self-hosters▲273

   Simple and opinionated OpenID Connect server designed for self-hosters - lastlogin-net/obligator

   2023 · github.com · its alternatives →

4. 4
   Distributed JMAP and IMAP Servers in Rust▲190

   I am happy to announce Stalwart JMAP [1], an open-source JSON Meta Application Protocol server that aims to be scalable, robust and secure. Some of its key features are: - JMAP Core, JMAP Mail and JMAP over WebSocket full compliance. - IMAP4 rev2&#x2F;1 support via Stalwart IMAP, an imap-to-jmap proxy [2]. - Scalable and fault tolerant: consensus over Raft, node autodiscovery over gossip and read-only replicas. - RocksDB backend with full-text search support in 17 languages. - OAuth 2.0 authorization code and device authorization flows. - Domain Keys Identified Mail (DKIM) message signing. -…

   2022 · github.com · its alternatives →

5. 5
   Open-source serverless security lake powered by Rust + Apache Iceberg▲63

   Open source security data lake for threat hunting, detection & response, and cybersecurity analytics at petabyte scale on AWS - matanolabs/matano

   2022 · github.com · its alternatives →

6. 6
   Coerce – Actor runtime for Rust using async/await and tokio channels▲155

   Actor runtime and distributed systems framework for Rust - LeonHartley/Coerce-rs

   2019 · github.com · its alternatives →

7. 7
   Second State Serverless FaaS▲92

   High-performance serverless functions for Rust & WebAssembly

   2020 · secondstate.io · its alternatives →

8. 8
   Minikv – Distributed key-value and object store in Rust (Raft, S3 API)▲71

   Hi HN, I'm Emilie, I have a literature background (which explains the well-written documentation!) and I've been learning Rust and distributed systems by building minikv over the past few months. It recently got featured in Programmez! magazine: https:&#x2F;&#x2F;www.programmez.com&#x2F;actualites&#x2F;minikv-un-key-value-st... minikv is an open-source, distributed storage engine built for learning, experimentation, and self-hosted setups. It combines a strongly-consistent key-value database (Raft), S3-compatible object storage, and basic multi-tenancy. Features&#x2F;highlights: - Raft…

   Feb 2026 · github.com · its alternatives →

9. 9
   I'm rewriting a web server written in Rust for speed and ease of use▲68

   Hello! I got quite some feedback on a web server I'm building, so I'm rewriting the server to be faster and easier to use. I (and maybe some other contributors?) have optimized the web server performance, especially for static file serving and reverse proxying (the last use case I optimized for very recently). I also picked a different configuration format and specification, what I believe is easier to write. Automatic TLS is also enabled by default out of the box, you don't need to even enable it manually, like it was in the original server I was building. Yesterday, I released the first…

   2025 · ferron.sh · its alternatives →

10. 10
    QoreDB▲95

    The fast, open-source database client built with Rust

    Mar 2026 · qoredb.com · its alternatives →

11. 11
    MCP-stama – An ultra-fast Rust MCP server with no dependencies▲73

    An ultra-fast, single-binary MCP server written in Rust as a lightweight alternative to Node.js/Python. - StamManif/mcp-stama

    Aug 2026 · github.com · its alternatives →

12. 12
    PGT-Proxy – A PostgreSQL Proxy in 277 Lines of Rust▲10

    It's time we talked about something many developers, data analysts, and even web application servers are guilty of: downgrading PostgreSQL connection security. Too often, we see connections dropped from full TLS verification to "any TLS" (i.e., sslmode=require) or, even worse, plain text connections. Why? Because most cloud providers, like AWS or Google Cloud SQL, use non-public Certificate Authorities for PostgreSQL. The result? Unverified TLS connections because no one has time to set up all devices across an organization to trust custom certificate authorities. And here's the most…

    2024 · github.com · its alternatives →

13. 13
    Condor – A library for building scalable TCP servers in Erlang▲65

    A minimal library for building scalable TCP servers in Erlang - sinasamavati/condor

    2018 · github.com · its alternatives →

14. 14
    Go library for concise, unambiguous and URL-safe UUIDs▲50

    A generator library for concise, unambiguous and URL-safe UUIDs - lithammer/shortuuid

    2015 · github.com · its alternatives →

15. 15AT
    A TCP Proxy in 30 lines of Rust▲19

    2021 · zmedley.com · its alternatives →

16. 16
    Orch8 – Durable workflow engine in Rust, one binary, Postgres or SQLite▲26

    Contribute to orch8-io/engine development by creating an account on GitHub.

    May 2026 · github.com · its alternatives →

17. 17
    Checking 320M passwords in milliseconds with serverless bloom filters▲33

    Using serverless functions to provide an API for checking potential passwords against an enormous corpus of passwords leaked from security breaches. - jthomas/serverless-pwned-passwords

    2017 · github.com · its alternatives →

18. 18
    Open-source project – HTTP cache and reverse proxy▲6

    Why advCache? Throughput: 160–170k RPS locally; ~250k RPS sustained on 24‑core bare‑metal with a 50GB cache. Memory safety: 1.5–3GB overhead at 50GB (no traces); ~7GB at 100% OTEL sampling. Hot path discipline: zero allocations, sharded counters, per‑shard LRU, TinyLFU admission. Control plane: runtime API for toggles (admission, eviction, refresh, compression, observability). Observability: Prometheus&#x2F;VictoriaMetrics metrics + OpenTelemetry tracing. Kubernetes‑friendly: health probes, config via ConfigMap, Docker image.

    2025 · borislavv.github.io · its alternatives →

19. 19
    Pyrtls, rustls-based modern TLS for Python▲22

    rustls-based modern TLS for Python. Contribute to djc/pyrtls development by creating an account on GitHub.

    2024 · github.com · its alternatives →

20. 20
    SMTP Server in Rust with DMARC, Dane, MTA-STS, Sieve, OTEL Support▲12

    I am happy to announce Stalwart SMTP [1], a modern SMTP server developed in Rust with a focus on security, speed, and extensive configurability. It features built-in DMARC, DKIM, SPF and ARC support for message authentication, strong transport security through DANE, MTA-STS and SMTP TLS reporting, and offers great flexibility and customization thanks to its dynamic configuration rules and native support for Sieve scripts. The project has been recently awarded a grant from NLNet and the European Commission's Next Generation Internet program to develop a mail server in Rust. The next step in…

    2023 · github.com · its alternatives →

21. 21
    I made an open-source Rust program for memory-efficient genomics▲17

    My cofounder and I run a startup in oncology, where we handle cancer genomics data. It occurred to me that, thanks to a recent complexity theory result, there's a clever way to run bioinformatics algorithms using far less RAM. I built this Rust engine for running whole-genome workloads in under 100MB of RAM. Runtime is a little longer as a result - O(TlogT) instead of O(T). But it should enable whole-genome analytics on consumer-grade hardware.

    Nov 2025 · github.com · its alternatives →

22. 22
    Written in Rust – Self hosted and fast GeoIP service with auto updates▲20

    A simple performant GeoIP server written in Rust using MaxMind DBs with auto database update - alisinabh/atlas

    2024 · github.com · its alternatives →

23. 23EA
    Effortless Authentication for Your Web Application▲6

    Hey folks, Michael here. I have been working in this project on and of for about a year and a half and I finally got it into a state where I can share it. I initially started this project to learn Rust and afterwards decided to make it useful for others. Vulpo Auth is an authentication server that you can host yourself. The goal was to make it as easy as possible for you to get started and have a complete authentication solution without you having to configure anything. Project Website: https:&#x2F;&#x2F;auth.vulpo.dev The Project contains: - Auth Server (Rust) - Admin Dashboard - JS and…

    2022 · its alternatives →

24. 24
    S3 compatible store with 1M IOPS(4K-R,p99~5ms), BYOC in 5min with rust▲23

    Ultra-high performance distributed storage system in the AI era. Powered by Fractal ART engine, Rust-native, io_uring, with multi-protocol (S3 object storage, POSIX FS, ...) - fractalbits-labs/fractalbits

    Dec 2025 · github.com · its alternatives →

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 →