We rebuild
websites and apps
— validated by AI,
shipped in weeks.
Most agencies ship AI-generated code you can’t trust. Parity ships production rebuilds where every change is verified against spec — before it reaches main, and again once it’s live.
Four layers of validation, running in a loop — before, during, and after every deploy.
- 01
Spec-driven generation
Every feature starts as an executable spec. The LLM builds against the spec, not a vibe.
spec/checkout-flow.md - 02
LLM-as-judge evaluators
Outputs graded on 40+ criteria — visual hierarchy, accessibility, conversion logic, brand voice.
eval/checkout.suite.ts - 03
Contract tests at every seam
API shapes, data schemas, and UI states locked in with property-based tests that regenerate on change.
contracts/*.schema.ts - 04
Evaluators in production
Validators keep running post-deploy. Every real session silently graded. Regressions caught in minutes.
obs/eval.stream
Real rebuilds. Measured deltas.
Numbers from the last 30 days of Parity rebuilds. We publish the metrics because the framework is the differentiator — and the framework leaves receipts.
- Production rebuilds
- 37
- across e-commerce, SaaS, fintech
- Avg. Lighthouse delta
- +41
- perf score, desktop, post-rebuild
- Validation checks per deploy
- 2,840
- median across last 30 days
- Time to first shipped phase
- 14d
- from intro call to staging cutover
From intro call to shipped, validated production — in three to six weeks.
Audit & spec authoring
We read the code, interview stakeholders, and convert intent into executable specs.
Build + validate loop
Agents generate, evaluators grade, and humans review. No code reaches main without passing spec.
Cutover + handoff
Gradual rollout with validators running live. Runbooks, eval config, and ownership handed to your team.
Bring the rebuild you've been postponing.
Intro calls are direct. We'll tell you if we're the right fit — or refer you to someone who is.