Estimated monthly cost comparison — not just the headline price
Airtable and Supabase overlap only partly, so check that both cover what you need before comparing cost.
Prices change often — confirm on the vendor's site before buying. Report incorrect pricing →
Quick Take
Supabase has the lower estimated monthly cost (~38%)
Based on advertised price plus documented recurring fees, not your exact usage.
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
Estimated monthly cost
$65
/month (illustrative)
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
Estimated monthly cost
$40
/month (illustrative)
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 |
| Estimated Monthly Cost | $65/mo | $40/mo | Supabase |
| Recurring Extra Fees | +$45/mo | +$40/mo | Supabase |
| One-Time Costs | $0 | $0 | — |
| # Documented Fees | 4 | 3 | — |
| Pricing Tiers | 4 | 3 | — |
| Affiliate Program | No public program | None | — |
Airtable advertises $20/mo and Supabase advertises $0/mo. Airtable has 4 documented extra fees (recurring: +$45/mo), while Supabase has 3 (recurring: +$40/mo). On these illustrative assumptions, Supabase has the lower estimated monthly cost (about 38% less). Your real cost depends on seats and usage — use the calculator for your numbers.
Airtable has 4 documented extra fees: Record Limit Forced Upgrade, Automation Run Hard Cap, Attachment Storage Silent Failure, API Rate Limit Wall. Recurring fees add roughly $45/mo on top of the $20/mo advertised price.
Supabase has 3 documented extra fees: Database Size Overage, Bandwidth Overage, Edge Function Invocation Limits. Recurring fees add roughly $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 compiled from public vendor pricing pages and documentation. It uses illustrative assumptions (see "Cost Comparison Summary"), not your exact seats or usage, and vendor prices change often. Confirm current prices on each vendor's site, and use our calculator with your own usage for a closer estimate. Spotted an error? Email hello@trulycritic.com.
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