How long does it take to build a custom SaaS replacement?
A typical SaaS replacement takes ~5 months from founding-cohort kick-off to go-live, including discovery, build, testing, data migration, and cutover. Go-live is scheduled ~1 month before your annual SaaS renewal so you switch cleanly without paying twice. Simpler tools: time tracking, field-service scheduling, visitor management: can land slightly under that. Systems with more moving parts: multi-role portals, deep integrations, compliance cert engines: may take a little longer. The founding cohort meets at the start to shape the feature set; from there the build runs with a senior-engineer team using agentic development to keep pace high and quality accountable.
Side-by-side comparison
| Build it yourself (internal dev) | With Rollout IT | |
|---|---|---|
| Typical timeline | 6–18+ months (discovery, hiring, build, QA, migration) | ~5 months (discovery, build, QA, migration: all included) |
| Who runs it | You: own the project, the scope, the QA, and the migration | We do: senior-engineer team, senior project accountability |
| Timeline risk | Every delay costs your team time and the SaaS licence keeps running | Fixed-scope build; timeline risk is ours, not yours |
| Migration included | Often scoped separately: a project in itself | Included: data migrated before cutover, old tool runs in parallel |
| Maintenance after go-live | Ongoing developer cost: hire internally or keep a retainer | Included in flat annual running fee: no separate retainer needed |
| What makes it longer | Complex integrations, compliance engines, or multi-role portals | Same factors: scoped upfront with transparent timeline adjustment |
| Founding cohort | Not applicable | ~5 co-funders shape v1 together; your priorities built in first |
Related questions
From founding-cohort confirmation: the moment the co-funding agreements are signed and discovery kicks off. We do not start the build on a handshake; we start when the cohort is confirmed and the scope is agreed.
Sources
- Rollout IT build delivery data (2024–2025, 50+ projects delivered)
- Retool 2026 State of Internal Tools
- Rollout IT founding-five model documentation
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