The Custom Builder
Nothing off the shelf fits, and you have someone who can build.
If your processes are genuinely unusual and you have developer-level skills, building your own CRM with AI coding tools can work, but time, security and upkeep cost more than the software. Our quiz also suggests CiviCRM as an open-source base to extend and Little Green Light as a low-cost fallback.
- Very unusual processes
- Developer available
- Willing to own security & upkeep
Best option when no off-the-shelf CRM fits
Your processes are genuinely unusual and you have developer-level skills on hand. Building your own with AI coding tools can work, but your biggest costs will be time, security and upkeep, not software. Read the build-vs-buy guide before you start.
Your options
Build your own
with AI coding toolsPlausible for you, but budget for time and upkeep, not just tools. AI tool plans cost about $20–$30/month12345; the bigger costs are security, backups and receipting.
- Read the build vs. buy guide, including the risks
- Run the 3-year cost calculator
- Start from our starter schema (below), not a blank prompt

CiviCRM
CiviCRM (open source)Open-source fallback you can extend rather than build from zero.
Open-source software; hosted option CiviCRM Spark is a 'low monthly subscription' (exact price not verified on the page).6

Little Green Light
Little Green LightLow-cost safety net if the build stalls.
$45/month up to 2,500 constituents; $60 up to 5,000; $75 up to 10,000; $90 up to 20,000; up to $135 for 50,000 (10% off billed annually). No charge for additional users.7
Want help making the switch?
Free for nonprofits: we'll help you get connected to the migration firm that best suits your needs. We only share your request with your consent, with up to 3 firms.
Nonprofit database starter schema
A Postgres/Supabase-friendly SQL schema so you don't start from a blank prompt: contacts, households, organizations, gifts, pledges & installments, recurring gift plans, campaigns & funds, soft credits, acknowledgments / receipts, consent & communication preferences, audit log. Includes row-level security for staff roles, an append-only audit log, to-do views for IRS $250 acknowledgments and $75 quid-pro-quo disclosures, and an ER diagram.
We'll send it to newsletter subscribers when it launches.
Guides for your likely move
Get ready to switch
Build vs. buy calculator
3-year cost of a vibe-coded CRM vs. a subscription, using published prices.
Run the numbersMigration readiness checklist
Every prep step, with progress saved in your browser. Print it or export it.
Start checkingSwitching cost calculator
Current vs. new CRM per month or year, one-time costs, payback and 3-year savings.
Estimate your costThe other personalities
Results are rule-based and transparent. See the scoring. No vendor pays for placement.
Sources
- Cursor pricing · verified Oct 16, 2026
- Lovable pricing & FAQ · verified Oct 16, 2026
- Bolt pricing · verified Oct 16, 2026
- Replit pricing · verified Oct 16, 2026
- Claude pricing · verified Oct 16, 2026
- CiviCRM Spark (hosted CiviCRM) · verified Oct 16, 2026
- Little Green Light pricing · verified Oct 16, 2026