Holdfast
The AI Build Sprint

One feature. Fourteen days. Fixed.

A Sprint is one production-ready feature, scoped on day 0, shipped to your production by day 14, for a fixed $9,500. If we miss the date, your next Sprint is free. That is the entire offer.

Most engineering work does not need a quarter. It needs a clear scope, a senior pair of hands, and a deadline that means something. The Sprint is built around exactly that.

You send a one-page brief. By end of day, we send back a fixed scope, a fixed price of $9,500, and a delivery date. For the next 14 days you watch the work happen: daily commits, a preview URL on every pull request, twice-weekly Loom updates, an async Slack channel that is always open. On day 14 the feature is in your production, with a README and a 10-minute handoff video.

If we miss day 14, your next Sprint is free. Not a discount, not a credit, the next one is on us. The promise is written into the contract as a date. We have not missed one yet, and the discipline that keeps it that way starts with being honest about what a Sprint can and cannot hold.

What counts

What counts as a sprint.

Bounded work with a knowable surface area and a scope we can fix on day 0. Eight examples of the real thing.

Stripe webhook reconciliation

Catch every billing event exactly once, even on retries and duplicate deliveries.

Supabase auth migration

Move onto Supabase Auth with row-level security designed alongside the schema.

AI chatbot RAG layer

Ground an assistant in your own documents, with citations and a hard refusal gate.

Postgres schema redesign

Rework a data model that has outgrown its first draft, with safe, reversible migrations.

Pages to App Router port

Port a bounded surface of a Next.js app, scoped tightly, shipped behind a feature flag.

Metered billing layer

Usage-based billing with idempotent events and a shadow-mode rollout before any charge.

Internal admin dashboard

A server-rendered admin surface a non-engineer on your team can actually run.

Third-party integration

Wire in a new API, a payment rail, Slack, a CRM, cleanly, tested, and documented.

What does not

What does not count.

Real, valuable projects. Just not a 14-day fixed-price sprint. We will tell you on the call rather than stretch a sprint over them.
  • A brand new greenfield product, built from zero.
  • A three-month enterprise build with many moving parts.
  • Anything that needs on-site stakeholder workshops to scope.
  • Native mobile applications, iOS or Android.
Method

A 14-day sprint.

Four steps, one fixed date. Here is exactly what happens between your brief and your production deploy.
  1. 01Day 0

    Brief and scope

    You send a one-page brief. We send back a fixed scope, a fixed price, and a delivery date by end of day.

  2. 02Days 1 to 3

    Spec and skeleton

    The partner writes the spec, the engineer scaffolds the code with Claude Code, and you get a Loom walking you through both.

  3. 03Days 4 to 12

    Build and review

    Daily commits, twice-weekly Loom updates, an async Slack channel. Claude Code, Cursor, and Linear, in the open. You watch the work happen.

  4. 04Days 13 to 14

    Ship and handoff

    Deploy to your production, write the README, record a 10-minute handoff video, and close the sprint.

If we miss day 14, your next Sprint is free. We have not missed yet.

Pricing

One price. One date.

The Sprint is $9,500, fixed. Discovery and Embedded are here too, for the work that does not fit a single Sprint.

Discovery Sprint

Scoping
$2,500/ 5 days
  • A written spec for the feature you want shipped next.
  • A fixed-price Sprint quote and ship date, both in the spec.
  • Two 45-minute working sessions with a partner.
  • Credited 100% against your next Sprint if you sign within 30 days.

Best for: scoping work where we both want a written spec before committing to a build.

Send a brief

AI Build Sprint

Fixed price
$9,500/ 14 days
  • One production-ready feature, scope locked on day 0.
  • If we miss day 14, your next Sprint is free.
  • Daily commits, twice-weekly Loom updates, async Slack.
  • A senior engineer named in your contract, founder reviewing.
  • Full handoff: production deploy, README, 10-minute video.

Best for: a specific feature, integration, or workflow you need shipped now.

Send a brief

Embedded Pod

Month to month
$13,500/ month, per engineer
  • A senior engineer embedded in your team, tools, and standups.
  • Month to month, 30-day notice, no minimum term.
  • Weekly cadence, daily Slack, a written monthly review.
  • Zero conversion fee if you later hire them full-time.
  • Founder review and a second engineer to pair when needed.

Best for: a continuous workload of 2 to 6 months.

Book a call
Sprint work

Three sprints that shipped.

FAQ

Sprint questions.

What founders ask before sending the first brief.

One production-ready feature, integration, or workflow with a scope we can fix on day 0. A Stripe billing layer, an auth migration, a RAG retrieval layer, a schema redesign. If we can write a fixed scope and a ship date for it, it is a Sprint.

Have a feature in mind?

Send a one-page brief. A fixed price and a ship date back by morning.

Send a briefOr book a 20-minute call