Guide · · By Vanta and Elif
What "local-first" actually means
Every product we ship says "local-first" on the label. So does a growing share of the industry — which means the term is starting to mean nothing. Here's what we mean by it, concretely, and what it costs us to build this way.
The plain definition
Local-first software runs on your machine and keeps its data on your machine. Not "syncs a copy locally," not "has an offline mode" — the computer you own is the primary home of the software and everything it knows. A server may exist, but it's optional, and losing it loses you nothing.
The test is simple: unplug the internet
A local-first tool keeps working. Your search still searches, your clipboard history is still there, your agent's guardrails still guard. If the product turns into a login screen the moment the Wi-Fi drops, it was never yours — you were renting access to someone else's computer.
Why it matters more with AI
AI tools see everything: your files, your conversations, your code, your half-formed ideas. Cloud AI means all of that transits and lives on infrastructure you don't control, under terms that can change after you've already uploaded your working life.
When the tool runs locally, "what does the vendor do with my data?" has a structural answer instead of a policy answer: nothing, because they never receive it. A guarantee enforced by architecture beats a guarantee written in a privacy policy.
What it looks like in practice
- Search indexes your transcripts and files into a database that sits in your home folder — install it, point it at your data, no account.
- Clipboard and knowledge tools store everything in a local database file you can open yourself.
- Agent security gates what an AI agent can do on the machine where the agent actually runs — because a guardrail that lives in the cloud is a guardrail with a network dependency.
What it costs (honestly)
Local-first is harder to build. There's no "we fixed it server-side overnight" — updates have to ship to you and work on your hardware, your OS, your runtime. There's no telemetry funnel quietly reporting what you clicked, so we rely on people actually telling us what broke. And it constrains the business model: you can't rent-seek on software the user fully possesses. That's why the marketplace works the way it does — you buy it, you have it, and what's listed is what it is.
What local-first is not
It isn't anti-cloud dogma. Sync, sharing, and collaboration are real needs, and reaching out to the network when you choose to is fine. The principle is about defaults and ownership: local is the default, the network is a feature you opt into, and leaving is always free — your data is already in your hands, in formats you can read.
The short version
Local-first means the software is on your side of the property line. In an era where every app wants to be a subscription to someone else's computer, we think that's worth building — and worth saying precisely. You can see the tools that follow this rule on the marketplace.