AI · alternatives · 2026
24 alternatives to Postman API Platform
Discover, test, and integrate APIs/LLMs to accelerate agents
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.
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Accelerate API development with Postman's all-in-one platform. Streamline collaboration and simplify the API lifecycle for faster, better results. Learn more.
2017 · postmancollections.com · its alternatives →
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Build AI agents that respond with UI instead of text
Feb 2026 · thesys.dev · its alternatives →
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Gradient▲153Developer API for building private LLMs that you own
2023 · hyperagent.com · its alternatives →
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SimplAIfree tier, from $5/mo▲589Hey HN, I've been building SimplAI for the past several months — it's a platform for building, testing, and deploying LLM-powered agents and multi-step workflows. The problem I kept running into: spinning up an AI agent pipeline means stitching together prompt management, tool calling, memory, evals, and deployment — often from scratch every time. SimplAI tries to be the layer that handles all of that so you can focus on what your agent actually does. What it does: - Visual + code-first workflow builder for chaining LLM calls, tools, and APIs - Built-in prompt versioning and A/B testing…
2025 · simplai.ai · its alternatives →
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Agent Simulate▲413Test your AI apps with thousands of digital humans
2025 · agentsimulate.com · its alternatives →
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Daily Bots▲223Build voice-to-voice AI agents with any LLM with Open Source
2024 · daily.co · its alternatives →
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Biggest library of ready-made API collections for Postman
2017 · bubble.io · its alternatives →
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Generative AI powered Master Agent Developer Framework
2023 · floatbot.ai · its alternatives →
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Arch▲314Hey HN — I’m Adil from Katanemo (with Salman, Shuguang, and Meiyu) We previously shared an early version of this project as ArchGW. Based on customer feedback, the scope expanded from “LLM routing and model access” into something broader: delivery infrastructure for agentic applications. We renamed it to Plano and reworked the architecture accordingly. The problem On-the-ground AI practitioners will tell you that calling an LLM is not the hard part. The really hard part is delivering agentic applications to production quickly and reliably, then iterating without rewriting system code every…
2024 · github.com · its alternatives →
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Build capable AI agents with memory & tools
2025 · mistral.ai · its alternatives →
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Colossal▲135Effortlessly integrate tool-using agents with a single fetch
2025 · colossalhq.com · its alternatives →
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Bring reliable AI virtual assistants to your app
2024 · scoopika.com · its alternatives →
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Plan and build at lightning speed with AI agents in Shortcut
2025 · shortcut.com · its alternatives →
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Integrate LLMs into your product in minutes with AI's help
2023 · outset.ai · its alternatives →
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Biggest Library of ready-made API Collections for Postman
2018 · bubble.io · its alternatives →
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APIEval-20▲121An open benchmark for AI agents that test APIs
May 2026 · resources.kusho.ai · its alternatives →
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Postman▲182Postman is a powerful HTTP client to test REST API
2014 · postman.com · its alternatives →
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UseAgents▲83Define tools once for agents use them everywhere
Mar 2026 · useagents.site · its alternatives →
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Build your own AI Agent for machines!
2025 · share.streamlit.io · its alternatives →
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6 Key Platform Improvements
2021 · blog.postman.com · its alternatives →
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Plano▲90Build agents faster, and deliver them reliably to production
Jan 2026 · planoai.dev · its alternatives →
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Find, build, and use AI agents in workflow automation
2023 · questflow.ai · 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 →