Our take
Pick Postmark if app teams who will stay on Free at $0 (100 emails / month, no overages) while they open a first Servers list, then buy Basic at $15 / month (10,000 emails, extra $1.80 / 1,000) when they leave the 100-email bucket. Pick Twilio if app teams who will stay on pay-as-you-go SMS at $0.0083 / message (no monthly platform tile) while they open a first Messaging Insights Overview, then buy Flex at $150 /
Best for
Postmark Transactional streams you start at $0
Twilio Delivery % you chart at a public $
Free plan
Postmark $0 · / month. 100 emails / month. No overages. Never expires. For testing an integration or a side project
Twilio No free plan
Lowest paid
Postmark Basic $15
Twilio Functions $0.0001
Next step up
Postmark Pro $16.50
Twilio Studio $0.0025
Runs where
Postmark Hosted
Twilio Hosted
Watch out
Postmark Free caps at 100 emails / month with no overages
Twilio $0.0083 is per SMS, not a seat
Last checked
Postmark 2026-10-23 · postmarkapp.com/pricing
Twilio 2026-10-23 · twilio.com/en-us/pricing
app teams who will stay on Free at $0 (100 emails / month, no overages) while they open a first Servers list, then buy Basic at $15 / month (10,000 emails, extra $1.80 / 1,000) when they leave the 100-email bucket.
Read the Postmark pageapp teams who will stay on pay-as-you-go SMS at $0.0083 / message (no monthly platform tile) while they open a first Messaging Insights Overview, then buy Flex at $150 / named user / month only if they need a contact-center seat.
Read the Twilio page
