AI · alternatives · 2026
24 alternatives to Astra Assistants API
Drop-in replacement for OpenAI's powerful new Assistants API
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier. Astra Assistants API launched in 2023; newer entries below may have overtaken it.
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Switchfree▲527Bring any AI agent into Slack, Teams & Discord. Open-source.
Aug 2026 · flintai.dev · its alternatives →
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GPT-6 Sol & Luna▲350Frontier AI intelligence, now at half the price
29d ago · openai.com · its alternatives →
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OpenAI o1 API ▲458OpenAI's most advanced model, o1 API to third-party devs
2024 · developers.openai.com · its alternatives →
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Ragwalla▲5Drop-in OpenAI Assistants replacement supporting 200+ models
2025 · ragwalla.com · its alternatives →
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Hi HN! I just released assistant-tui, a terminal user interface for OpenAI's Assistant API. If terminal is your thing, it can be a great way to test and evaluate the API and its results. It implements not only the API, but also all the infrastructure to make it work, including polling, local repository, and more. Feedbacks and stars are welcome! https://github.com/dalssoft/assistant-tui
2024 · github.com · its alternatives →
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TeamSmart AI▲87The Chrome extension to increase productivity with ChatGPT
2023 · askai.free · its alternatives →
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Get ready to chat with your ultimate video companion
2023 · kites.dev · its alternatives →
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Hello HN, I’ve always loved building frontend-only apps—those you can prototype over a weekend, host for free on GitHub Pages, and scale to millions of users. Unfortunately, AI-enabled apps complicate things, as exposing your OpenAI key to the world is obviously a no-go. This also means mobile developers often have to run their own servers. That’s why I built ServerlessAI, an API gateway that lets you securely call multiple AI providers directly from client side using OpenAI-compatible APIs. You can authenticate users through any identity provider, like Google or Apple, and set per-user…
2024 · serverlessai.dev · its alternatives →
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TeamSmart▲85Get more done with AI assistants at your fingertips
2023 · teamsmartai.com · its alternatives →
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api2ai parses OpenAPI Spec to generate an agent that can make API calls. For context, I recently need to explore a handful of API suites and thought LLMs can help expedite this process. After some digging, I found OpenAPI Specs are perfect fit for function calling. Based on a text prompt, api2ai can select the right endpoint and properly parse request params and make api calls. It also handles authentication, currently it supports basic auth, api keys, and bearer token schemes. The tool has helped me explore and see APIs in action without a deep dive into the docs or using postman. It’s open…
2023 · github.com · its alternatives →
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✦ Gemini ➜ OpenAI API proxy. Serverless! Contribute to PublicAffairs/openai-gemini development by creating an account on GitHub.
2024 · github.com · its alternatives →
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APIMart▲8One API for All the Best AI Models – Try Affordable AI API
Nov 2025 · apimart.ai · its alternatives →
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Built and open sourced Superchange.ai: an AI agent gathering and organizing updates from tech providers into one neat changelog feed. - Client: https://www.superchange.ai/ - API: https://api.superchange.ai/ - Source: https://github.com/superchangeai MIT-licensed. Free. Why I built it: API providers move so fast it becomes impossible to do my job, stay in sync, plan, build, or maintain. What early users said: "There were so many times when a random update threw us into a panic. Won't happen again." Feedback is most welcome. Bugs, providers…
2025 · superchange.ai · its alternatives →
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i built an open source version of OpenAI Assistants API it's compatible with any LLM & embeddings model and u can swap it out for OpenAI assistants API with just one line of code. if you want this let me know 👇
2023 · twitter.com · its alternatives →
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Loktra▲10The AI that answers from your data, not the internet
Jun 2026 · loktralabs.com · its alternatives →
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ASR+NLI stack outperforming OpenAI, Google—open to builders
2025 · tally.so · its alternatives →
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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 →