Ship with a plan.
Migrations stall for a thousand reasons. Tern finds them all day one.
$ curl tern.sh/install.sh | bash
Let Tern do the work everybody dreads.
Tern reads your codebase, docs, and changelogs to find everything that'll break
You type "upgrade to Python 3.12."
Tern reads your entire codebase - every import, every call, every weird thing someone did in 2019, plus changelogs and breaking change guides.
Within minutes, you know exactly what breaks: the dependency with no Python 3 version, the awful hardcoded thing, all of it.
Work tied to your codebase: what needs fixing, where it is, and how many instances
"Update authentication" becomes 147 precise changes like "Replace bcrypt.compare at auth.js:234."
Every piece of work is grouped and ready for bulk execution. Tricky changes come with detailed instructions that make it easy for other teams or AI to pick up.
Make hundreds of changes without the AI falling apart halfway through
Tern writes its own tools and runs them in an agentic loop, handling all 500 slightly-different versions of the same fix.
You review the tricky stuff, and Tern handles the repetitive work that needs to run hundreds of times.
Tern reads your codebase, docs, and changelogs to find everything that'll break
You type "upgrade to Python 3.12."
Tern reads your entire codebase - every import, every call, every weird thing someone did in 2019, plus changelogs and breaking change guides.
Within minutes, you know exactly what breaks: the dependency with no Python 3 version, the awful hardcoded thing, all of it.
Built for every type of migration.
Every Python, React, Vue, Node, or Ruby version bump.
Tern finds the specific versions and maps all changes needed.
Upgrade our frontend framework, find all 47 new packages and make sure they'll work for us
Get the demoTrusted by engineering teams.
Every migration is a quarter you're not building something that might actually move the business. Anything that does that work faster gives you so much time back.Abel Mathew
CTO, Sauce Labs
Tern mapped out our Django upgrade and showed us it was actually straightforward. That clarity gave us the confidence to just start instead of spending weeks in analysis paralysis.Matt Bianchi
Senior Engineer, Cedar
Migrations always take longer than you think. At every point, I'd estimate 30 minutes, it'd take two days. Knowing the real scope up front? That's the difference between a 2-week project and a 3-month slog.Arup Chakrabarti
Senior Director of Engineering, PagerDuty
Done dreading migrations?
Install Tern now to plan your next migration, stress-free.
$ curl tern.sh/install.sh | bash