New SaaS products rarely struggle because the first release was too small. More often, the first release tries to do too much, arrives late, and teaches the team less than a narrower version would have.
Eric Ries defined the minimum viable product as the version of a new product that lets a team collect the maximum amount of validated learning about customers with the least effort. For B2B SaaS there is a second requirement: the first release has to be usable enough that a real customer will put real work through it.
Define the job, the user and the first success
Write one paragraph covering who the first users are, the single job they will use the product for, and what would count as success in the first months of use. Everything in the first release should serve that job.
A hypothetical example
A team wants to build a SaaS platform for independent training providers to manage course bookings, payments, attendance and certificates, with integrations to accounting software and a CRM.
A focused first release might cover course listings and booking, card payments through a payment provider, attendance marking and automatically generated completion certificates. Accounting is handled initially with an export the provider’s bookkeeper already knows how to import. CRM sync, multi-currency pricing and a mobile app wait until real usage shows they are needed.
That release is small, but it handles a complete job from booking to certificate. That is what makes it usable rather than a demo.
Scope: cut features, not quality
- Complete one workflow end to end instead of starting several.
- Keep the non-negotiables: authentication, permissions, backups, a record of important changes, and sound security practice such as addressing the OWASP Top 10. These are hard to retrofit, and customers notice their absence.
- Defer configurability. Use sensible defaults for the first customers and add settings when several of them genuinely need different behaviour.
- Accept some manual operations behind the scenes while volumes are low, such as an admin action instead of a self-service screen.
Integrations: only what the first job needs
Integrations are often the largest source of hidden effort. Third-party APIs have rate limits, authentication flows, sandbox environments and edge cases of their own.
- Payments: use the provider’s hosted components where possible and handle its webhooks properly. Stripe’s documentation, for example, explains verifying webhook signatures, and its API supports idempotency keys so a retried request isn’t processed twice.
- Accounting and CRM: ask whether an export or a one-way sync is enough at first. Two-way sync raises the question of which system wins when records conflict.
- Single sign-on and directory integrations: important for larger customers, but often deferrable for early adopters.
Whatever you integrate, log requests and failures so problems can be diagnosed, and design for the third-party service being slow or unavailable.
Architecture decisions worth making early
A few choices are expensive to change later:
- Tenant isolation. Decide how each customer’s data is kept separate (shared tables with a tenant identifier, separate schemas or separate databases) and enforce it consistently. AWS’s whitepaper on SaaS tenant isolation strategies sets out the trade-offs.
- Configuration and environments. Keep configuration separate from code and staging close to production, as the Twelve-Factor App principles describe.
- Observability. Error tracking, logs and basic usage metrics from the first release, so you can see how the product is actually used.
Avoid premature scaling work, such as splitting into many services or multi-region deployment, until load or customer requirements justify it.
Trade-offs
A narrow release may disappoint prospects who expect a long feature list, and manual processes behind the scenes don’t scale. Deferring an integration can slow adoption in organizations that rely on it. These are deliberate trade-offs that buy earlier feedback, and they should be revisited as soon as usage shows where the product needs to grow.
Timelines depend on the workflow’s complexity, the integrations involved and how quickly decisions can be made, so estimates only become meaningful once the scope is written down.
Where to start
Write the one-paragraph definition above, list the integrations the first job truly needs, and agree what “usable” means for your first customers before committing to a build plan.
If you’re planning a SaaS product and would like a second opinion on scope or integrations, we’re happy to talk it through.
