Sonnet Code
Industry · Consumer & Tech

Software engineering for SaaS & Startups.

Engineering partner for SaaS teams between pre-seed and Series B.

We work with SaaS companies at the stage where every engineering decision has second-order effects. We'll help you ship the feature, but we'll also tell you when the feature is going to make your next migration painful — and we'll show you the cheaper path.

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Jump-start your SaaS & Startups

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SaaS & Startups in production
Why Sonnet Code for SaaS & Startups

The bar we hold ourselves to.

Scale-aware defaults

Multi-tenant isolation, billing primitives, and auth patterns that hold up from 100 to 100k customers without a rewrite.

Ship-fast, keep-quality

We work in the cadence a startup needs — weekly shipping, tight feedback loops — without dropping tests, observability, or code review.

Founder-literate

We've built for founders. We know the difference between what a founder says they want and what they actually need to hit their next milestone.

What we build with SaaS & Startups

SaaS & Startups work, shipped.

Product MVPs

Version-one products shipped in weeks, architected so you're not rewriting them at Series A.

Billing & subscriptions

Stripe, metered billing, trials, dunning — implemented correctly so revenue doesn't leak.

Growth & analytics

Product analytics, experimentation infrastructure, and funnel instrumentation wired in from day one.

AI features

Shipping real AI into SaaS products — RAG, assistants, classification — with evaluation pipelines so quality is measurable.

Stack

Inside our SaaS & Startups practice.

Next.jsTypeScriptPostgreSQLStripePostHogVercelOpenAI SDKClerk

Ready to get started with SaaS & Startups? Fifteen minutes is all it takes.