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Overage / Compare / Email APIs

Plunk vs Postmark pricing

Verified 2026-10-23 (2 days ago)Source: Plunk: www.useplunk.com/pricing, Postmark: postmarkapp.com/pricingVerified shows the older of the two.

Monthly cost at three volumes

Monthly cost of Plunk and Postmark at three volumes and at your own
VolumePlunkPostmark
small5K emails sent$5 / moPay as you grow$15 / moBasic
growing50K emails sent$50 / moPay as you grow$66 / moPlatform
scale500K emails sent$500 / moPay as you grow$606 / moPlatform
your volumeset above$50 / moPay as you grow$66 / moPlatform

Each cell is the cheapest feasible plan, or the chosen model, at that volume, from the shared Overage cost function. "Cheapest model" only considers models with both an input and an output price listed. Volumes are example scenarios you can edit.

Tiers, aligned by position

Tiers of Plunk and Postmark aligned by position: free, entry, mid, top
PositionPlunkPostmark
Free$0 / moFree · 1,000 emails sent / mo$0 / moFree · 100 emails sent / mo
Entry$0 base + usagePay as you grow$15 / moBasic · 10,000 emails sent / mo
Midno tier$16.50 / moPro · 10,000 emails sent / mo
Topno tier$18 / moPlatform · 10,000 emails sent / mo

Tightest rate limit

Tightest documented rate limit of each service
MeasurePlunkPostmark
Tightest limitunlistedunlisted

Changes in the last 90 days

No changes recorded.

No change detected for either service in the last 90 days.