True cost comparison — not just what the pricing page says
Quick Verdict
Supabase saves you 100%
Best for Supabase
All-in-one workspace for notes, docs, databases, and wikis. Affordable for small teams, but AI credi
Best for Notion
Open-source Firebase alternative with Postgres database. Free tier is generous, then $25-$599/mo — b
Open-source Firebase alternative with Postgres database. Free tier is generous, ...
Advertised
$0
/month
True Cost
$40
/month (typical)
Database Size Overage
Pro plan includes 8GB database. Additional storage costs $0.125/GB/mo. A growing app at 50GB = $5.25...
Bandwidth Overage
Pro includes 250GB bandwidth/mo. Additional bandwidth: $0.09/GB. High-traffic APIs or real-time subs...
Edge Function Invocation Limits
Pro includes 2M edge function invocations/mo. Additional invocations at $2 per million. Serverless-h...
All-in-one workspace for notes, docs, databases, and wikis. Affordable for small...
Advertised
$10
/month
True Cost
$60
/month (typical)
Notion AI Credits (Custom Agents)
AI features are NOT included in any plan. $10 per 1,000 credits, consumed per AI action. Teams using...
Custom Automation Feature Gate
Plus ($10/member/mo) only includes button-only automations. Custom database automations (triggered, ...
API Access Paywall
API and webhooks require Plus at minimum ($10/member/mo). Free plan has no API access for integratio...
$10/mo annual
$20/mo annual
Notion advertises $10/mo. Supabase advertises $0/mo.
Notion has 3 documented hidden fees. Supabase has 3.
Notion confidence: 78%. Supabase confidence: 77%.
| Metric | Supabase | Notion | Winner |
|---|---|---|---|
| Advertised Price | $0/mo | $10/mo | Supabase |
| True Monthly Cost | $40/mo | $60/mo | Supabase |
| Hidden Fee Total | +$40/mo | +$50/mo | Supabase |
| # Hidden Fees | 3 | 3 | Supabase |
| Confidence Score | 77% | 78% | Notion |
| Pricing Tiers | 3 | 4 | — |
| Affiliate Program | None | No public program | — |
Supabase advertises $0/mo and Notion advertises $10/mo. However, when you include hidden fees, Supabase has 3 documented hidden fees adding +$40/mo, while Notion has 3 hidden fees adding +$50/mo. Based on true cost, Supabase is typically 100% cheaper.
Supabase has 3 documented hidden fees: Database Size Overage, Bandwidth Overage, Edge Function Invocation Limits. These add approximately +$40/mo on top of the $0/mo advertised price.
Notion has 3 documented hidden fees: Notion AI Credits (Custom Agents), Custom Automation Feature Gate, API Access Paywall. These add approximately +$50/mo on top of the $10/mo advertised price.
Choose Supabase if: All-in-one workspace for notes, docs, databases, and wikis. Affordable for small teams, but AI credi. Choose Notion if: Open-source Firebase alternative with Postgres database. Free tier is generous, then $25-$599/mo — b. The right choice depends on your team size, usage volume, and which features you need most.
This comparison is based on manual research of official pricing pages, terms of service, and user reports. Supabase data has a 77% confidence score and Notion has 78%. Prices were last verified in April 2026. For the most accurate estimate, enter your specific usage in our calculator.
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