Dev tools · alternatives · 2026

24 alternatives to open-fdd

Fault Detection Diagnostics (FDD) for HVAC datasets - bbartling/open-fdd

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
   Puddl▲604

   Get complete breakdown of OpenAI API usage for free

   2023 · puddl.io · its alternatives →

2. 2
   superlog▲497

   Hey HN, we’re Nico and Arseniy, co-founders of Superlog (https://superlog.sh). We're building a self-installing, self healing observability tool meant not to be opened. It has a wizard that daily sets up proper logging and an agent that investigates errors and opens PRs. Super short demo: https://www.youtube.com/watch?v=xFhU9Mk247M. In our earlier startups, we tried Sentry, Datadog, Grafana, Dash0, and nothing was good enough. Proper telemetry and alerting still requires a ton of manual setup. We struggled with adding good logs, so debugging was tough, especially as…

   Jun 2026 · superlog.sh · its alternatives →

3. 3
   OpenAI o3-mini▲510

   Pushing the frontier of cost-effective reasoning

   2025 · openai.com · its alternatives →

4. 4
   Komiser▲386

   Open-source cloud environment inspector

   2023 · komiser.io · its alternatives →

5. 5MI
   Monitor in a Box – Instantly usable, open source monitoring▲74

   2016 · solutions.stacktile.io · its alternatives →

6. 6
   Open source data discovery and observability platform▲122

   With the OpenDataDiscovery Platform, you can collect metadata from any data source, regardless of format or location. This powerful platform provides data discovery, observability, and trust for your entire data pipeline.

   2022 · opendatadiscovery.org · its alternatives →

7. 7
   gpt-oss-safeguard▲119

   Open safety reasoning models with custom safety policies

   Oct 2025 · openai.com · its alternatives →

8. 8
   Openlit▲152

   One click observability & evals for LLMs & GPUs

   2024 · openlit.io · its alternatives →

9. 9
   Open-source A/B testing framework▲199

   Open Source Feature Flags, Experimentation, and Product Analytics - growthbook/growthbook

   2021 · github.com · its alternatives →

10. 10
    SpecDD▲10

    Build better software with spec-driven AI

    May 2026 · specdd.ai · its alternatives →

11. 11
    OpenBox▲171

    See, verify, and govern every agent action.

    Apr 2026 · openbox.ai · its alternatives →

12. 12
    OpenDataDiscovery▲105

    First open-source data discovery and observability platform

    2022 · opendatadiscovery.org · its alternatives →

13. 13
    Bor – Open-source policy management for Linux desktops▲197

    Hi HN! I've been working on Bor, an open-source system for centralized Linux desktop management. Bor consists of a lightweight Go agent and a central server. Policies are streamed to clients over mTLS/gRPC in real time—no polling—and currently support Firefox, Chrome, KDE, dconf, polkit and package management, with more coming. Version 0.8 introduces several new policy types - Thunderbird, Microsoft Edge for Business and FirewallD zones, along with a number of improvements and fixes. I'd love feedback on the architecture, policy model, and whether this is something you'd consider for…

    Aug 2026 · getbor.dev · its alternatives →

14. 14
    OpenAPI fuzzer – fuzzing APIs based on OpenAPI specification▲76

    Black-box fuzzer that fuzzes APIs based on OpenAPI specification. Find bugs for free! - matusf/openapi-fuzzer

    2021 · github.com · its alternatives →

15. 15
    Alaz: Open-Source, Self-Hosted, eBPF-Based K8s Monitoring▲101

    Hello Everyone, I'm excited to introduce a new open-source observability platform and would love to hear your feedback. We are aware that there are lots of open-source/commercial tools out there. However, we believe that monitoring the clusters and extracting actionable insights requires deep know-how about the tools/domain. We mainly focused on this problem. - Alaz is an eBPF agent installed on your K8s cluster as DaemonSet. Thanks to eBPF, Alaz collects traces directly from Linux kernels. This means there's no need for sidecars, instrumentations, or service restarts. - The UI not…

    2023 · github.com · its alternatives →

16. 16
    EuConform – Offline-first EU AI Act compliance tool (open source)▲71

    I built this as a personal open-source project to explore how EU AI Act requirements can be translated into concrete, inspectable technical checks. The core idea is local-first compliance: – risk classification (Articles 5–15, incl. prohibited use cases) – bias evaluation using CrowS-Pairs – automatic Annex IV–oriented PDF reports – no cloud services or external APIs (browser-based + Ollama) I’m especially interested in feedback on whether this kind of technical framing of AI regulation makes sense in real-world projects.

    Jan 2026 · github.com · its alternatives →

17. 17
    Streamdal▲143

    Detect and resolve data quality incidents faster

    2023 · streamdal.com · its alternatives →

18. 18
    CueObserve▲73

    Open-source Anomaly detection on SQL data

    2021 · github.com · its alternatives →

19. 19
    Hawk▲129

    Open-source errors tracker

    2022 · hawk.so · its alternatives →

20. 20
    Open AI o3 API▲141

    Advanced reasoning models with safety-first innovation.

    2024 · openai.com · its alternatives →

21. 21
    Airbroke▲96

    Lightweight, PG based, airbrake-compatible error catcher

    2023 · github.com · its alternatives →

22. 22OS
    Open-source model routing for coding agents at Astra-level performance▲122

    23d ago · its alternatives →

23. 23
    Airboxlab▲108

    Open source air quality monitor you can build yourself

    2015 · airboxlab.foobot.io · its alternatives →

24. 24KA
    Koda, a typesafe functional toolkit for Python▲110

    2022 · pypi.org · 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 →