Voiden is an offline-first, git-native API tool built on Markdown - and it very intentionally didn’t start as “let’s build a better Postman”.
Over time, API tooling became heavyweight: cloud dependencies for local work, forced accounts, proprietary formats, and workflows that break the moment you’re offline. Testing a localhost API shouldn’t need an internet connection.
So we asked a simple question: What if an API tool respected how developers already work?
That led to a few core ideas:
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Offline-first, no accounts, no telemetry
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Git as the source of truth
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Specs, tests, and docs living together in Markdown
We opensourced Voiden because extensibility without openness just shifts the bottleneck.
If workflows should be transparent, the tool should be too.
Github : https://github.com/VoidenHQ/voiden
Download here : https://voiden.md/download
It’s 2026, and we’re still essentially filling in the same request forms from almost two decades ago. Headers table. Params table. Body tab. Raw/JSON toggle. Postman’s surrounding ecosystem grew. The pricing model evolved. The cloud story expanded. But the core interaction model barely changed.
For a company that once redefined API tooling, I feel they dropped the ball in innovating the hell out when they had the chance. Now they are burdened by their own success - cant move and cant adapt. Only squeeze people for more.
And maybe the bigger impact, sadly of Postman, is what happened to the ecosystem. Because Postman defined the category so strongly, most competitors copied it. For years, innovation in API tooling meant “Postman, but open-source” or “Postman, but git-based.” The dominant UX pattern became the ceiling. Everyone optimized to replace it - few tried to rethink it.
And I think thats where I see tools like Voiden as a breath of fresh air - a modern take, composable blocks, programmable interfaces. I love it. I dont want to be clicking 100 buttons to figure out whats in my api “tab”. :D