True cost comparison — not just what the pricing page says
Quick Verdict
Supabase saves you 100%
Best for Airtable
Spreadsheet-database hybrid loved by teams. Simple to start, expensive to scale — record limits, aut
Best for Supabase
Open-source Firebase alternative with Postgres database. Free tier is generous, then $25-$599/mo — b
Spreadsheet-database hybrid loved by teams. Simple to start, expensive to scale ...
Advertised
$20
/month
True Cost
$65
/month (typical)
Record Limit Forced Upgrade
50K records per base on Team ($20/user/mo). Hitting the limit forces upgrade to Business at $45/user...
Automation Run Hard Cap
25K automation runs on Team. When exhausted, automations STOP — no overage purchase option. Must upg...
Attachment Storage Silent Failure
20GB per base on Team. When full, new attachments fail silently — no error message. No per-GB overag...
API Rate Limit Wall
Hard 5 req/sec per base rate limit on ALL plans below Enterprise. Apps hitting this get 429 errors w...
$20/mo annual
$45/mo annual
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...
Airtable advertises $20/mo. Supabase advertises $0/mo.
Airtable has 4 documented hidden fees. Supabase has 3.
Airtable confidence: 80%. Supabase confidence: 77%.
| Metric | Airtable | Supabase | Winner |
|---|---|---|---|
| Advertised Price | $20/mo | $0/mo | Supabase |
| True Monthly Cost | $65/mo | $40/mo | Supabase |
| Hidden Fee Total | +$45/mo | +$40/mo | Supabase |
| # Hidden Fees | 4 | 3 | Supabase |
| Confidence Score | 80% | 77% | Airtable |
| Pricing Tiers | 4 | 3 | — |
| Affiliate Program | No public program | None | — |
Airtable advertises $20/mo and Supabase advertises $0/mo. However, when you include hidden fees, Airtable has 4 documented hidden fees adding +$45/mo, while Supabase has 3 hidden fees adding +$40/mo. Based on true cost, Supabase is typically 100% cheaper.
Airtable has 4 documented hidden fees: Record Limit Forced Upgrade, Automation Run Hard Cap, Attachment Storage Silent Failure, API Rate Limit Wall. These add approximately +$45/mo on top of the $20/mo advertised price.
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.
Choose Airtable if: Spreadsheet-database hybrid loved by teams. Simple to start, expensive to scale — record limits, aut. Choose Supabase 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. Airtable data has a 80% confidence score and Supabase has 77%. Prices were last verified in April 2026. For the most accurate estimate, enter your specific usage in our calculator.
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