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Dev tools · alternatives · 2026

24 alternatives to OpenAstra – Chat based open-source alternative to Postman

Hi HN, I'm excited to finally launch this project. While existing tools like Postman excel at API discovery and testing, they often require us to navigate complex interfaces, manually construct requests, etc. That's why I created OpenAstra. The core idea is to combine the visual richness of traditional API tools with the simplicity of a chat interface. Think of it as "Postman meets ChatGPT" - allowing us to interact with APIs through natural conversation while retaining core essential features of traditional API tools. If you want to test an endpoint or understand what it does? Just ask. The…

OpenAstra is an open-source API testing tool that uses a chat-based interface instead of traditional menus and forms. Users can test endpoints and explore APIs through natural conversation rather than manually… 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
    ChatGPT▲1,643

    A long, meandering, playful conversation with ChatGPT, where I take it through a whirlwind of associative tangents (in order to relax its constraints), then put it into a hypnotic trance and take it into a past-lives regression where it re-lives its own training data. Then I switch it back and forth between "4o" and "o1-preview", engage in some self-reflective philosophizing and ask it to write an essay summarizing our interaction. Some of this is just goofy fun. Some of it is me exploring the tradeoffs between policy alignment, imagination, chain-of-thought reasoning, memory, agreeableness,…

    2022 · chatgpt.com · its alternatives →

  2. 2

    An API from OpenAI for ChatGPT

    2023 · openai.com · its alternatives →

  3. 3

    Last time I posted this it didn't garner much interest. There have been lots of improvements and fixes since the last release. Quick list of features: - Workspaces - Tabs - Nested Folders - Lots of context menus - Response history - Plugins - Runs fully in the browser and runs offline if necessary - Chrome and Firefox extension to bypass CORS restrictions - Desktop builds for all platforms - GraphQL support - Import collections exported from Postman and Insomnia - Simple user friendly interface I built this because I love Insomnia but wanted a portable version that I could run in the…

    2022 · restfox.dev · its alternatives →

  4. 4

    Hey everyone, We have been building SecureAI Tools -- an open-source application layer for ChatGPT and ChatPDF-like AI tools. It works with locally running LLMs as well as with OpenAI-compatible APIs. For local LLMs, it supports Ollama which supports all the gguf/ggml models. Currently, it has two features: Chat-with-LLM, and Chat-with-PDFs. It is optimized for self-hosting use cases and comes with basic user management features. Here are some quick demos: * Chat with documents using OpenAI's GPT3.5 model: https://www.youtube.com/watch?v=Br2D3G9O47s * Chat with documents…

    2023 · github.com · its alternatives →

  5. 5IB

    Hi HN, I built this out of frustration of the evergrowing list of AI models and features to try and to fit my workflow. The visual approach clicks for me so i went with it, it provides more freedom and control of the outcome, because predictable results and increased productivity is what I’m after when using conversational AI. The app is packed with features, my most used are prompt library, voice input and text search, narration is useful too. The app is local-first and works right in the browser, no sign up needed and it's absolutely free to try. BYOAK – bring your own API Keys. Let me…

    2024 · grafychat.com · its alternatives →

  6. 6

    Open-source live-chat, email support, omni-channel desk. An alternative to Intercom, Zendesk, Salesforce Service Cloud etc. 🔥💬 - chatwoot/chatwoot

    2019 · github.com · its alternatives →

  7. 7

    I spent the last few days building out a nicer ChatGPT-like interface to use Mistral 7B and Llama 3 fully within a browser (no deps and installs). I’ve used the WebLLM project by MLC AI for a while to interact with LLMs in the browser when handling sensitive data but I found their UI quite lacking for serious use so I built a much better interface around WebLLM. I’ve been using it as a therapist and coach. And it’s wonderful knowing that my personal information never leaves my local computer. Should work on Desktop with Chrome or Edge. Other browsers are adding WebGPU support as well - see…

    2024 · github.com · its alternatives →

  8. 8

    Open AI announced ChatGPT Plugins to access real-world data

    2023 · openai.com · its alternatives →

  9. 9
    Jan▲329

    Open-source ChatGPT alternative that runs 100% offline

    2024 · jan.ai · its alternatives →

  10. 10

    The first open source alternative to ChatGPT

    2023 · huggingface.co · its alternatives →

  11. 11

    Build, code and ship in app messaging in a few hours

    2019 · getstream.io · its alternatives →

  12. 12

    Access OpenAI's ChatGPT anywhere on the web

    2022 · chromewebstore.google.com · its alternatives →

  13. 13

    Greetings! YakGPT is a simple, frontend-only, ChatGPT UI you can use to either chat normally, or, more excitingly, use your mic + OpenAI's Whisper API to chat hands-free. Some features: * A few fun characters pre-installed * No tracking or analytics, OpenAI is the only thing it calls out to * Optimized for mobile use via hands-free mode and cross-platform compressed audio recording * Your API key and chat history are stored in browser local storage only * Open-source, you can either use the deployed version at Vercel, or run it locally Planned features: * Integrate Eleven Labs & other TTS…

    2023 · yakgpt.vercel.app · its alternatives →

  14. 14

    An open-source ChatGPT app with a voice. Contribute to cogentapps/chat-with-gpt development by creating an account on GitHub.

    2023 · github.com · its alternatives →

  15. 15

    Hey HN, we've been working with OpenAI for the past few months on the new Realtime API. The goal is to give everyone access to the same stack that underpins Advanced Voice in the ChatGPT app. Under the hood it works like this: - A user's speech is captured by a LiveKit client SDK in the ChatGPT app - Their speech is streamed using WebRTC to OpenAI’s voice agent - The agent relays the speech prompt over websocket to GPT-4o - GPT-4o runs inference and streams speech packets (over websocket) back to the agent - The agent relays generated speech using WebRTC back to the user’s device The…

    2024 · github.com · its alternatives →

  16. 16

    Create a GPT chatbot for any GitHub repo in just 30 seconds

    2023 · codebasechat.com · its alternatives →

  17. 17
    ChatKit▲77

    Give your ChatGPT API super power

    2023 · chatkit.app · its alternatives →

  18. 18

    Contribute to staab/git-chat development by creating an account on GitHub.

    2016 · github.com · its alternatives →

  19. 19

    I've built this PWA to use ChatGPT by API. My main motivation was to use the API since it is much cheaper than the premium plan and I only pay for usage. The main inspiration was ChatGPT-web by Niek [1], but I was lacking time to dig into the code base to make changes. Hence I went for a lightweight approach with Alpine.js and Open Props. There is no build step, the dependencies are fetched via CDN. In general it was much fun to work with Alpine.js - being a parent means having very little time. So it was great to not have to invest 20h into learning a new framework. My main ask was…

    2023 · github.com · its alternatives →

  20. 20

    Hey HN! Over the past few months, I've been working on building Omni - a workplace search and chat platform that connects to apps like Google Drive/Gmail, Slack, Confluence, etc. Essentially an open-source alternative to Glean, fully self-hosted. I noticed that some orgs find Glean to be expensive and not very extensible. I wanted to build something that small to mid-size teams could run themselves, so I decided to build it all on Postgres (ParadeDB to be precise) and pgvector. No Elasticsearch, or dedicated vector databases. I figured Postgres is more than capable of handling the level…

    Mar 2026 · github.com · its alternatives →

  21. 21OS

    https://github.com/KTruong008/aichatbestie Been working on this since last week and glad to share it here and now! There's already been a few other takes on this idea, but I figured none would fit me as well as if I had just built it myself. All messages are sent and stored locally in the browser for privacy and speed. Accounts are optional and upgrading is a one-time deal. Any questions, comments, feedback, please, I'd like to hear it all!

    2023 · aichatbestie.com · its alternatives →

  22. 22
    Joia▲120

    Open-source "ChatGPT for Teams" alternative

    2024 · joia.so · its alternatives →

  23. 23

    Ask questions about Twitter's open-sourced algorithm

    2023 · chat-twitter.vercel.app · its alternatives →

  24. 24

    Turn ChatGPT conversations into intelligent APIs in seconds

    2023 · alicent.com · its alternatives →

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