Apollo Deploy
6 providersDocumented feature coverage and published costs

Compare transactional email providers. Choose the delivery layer.

Compare Apollo Signal, Resend, SendGrid, Mailgun, Postmark, and Cloudflare against the integration, operational, and pricing criteria that affect production email.
Compare provider features

Compare the delivery model, not just the logo. Make the trade-offs visible.

A decision framework for production email
Use the same criteria for every provider: the integration path your team will maintain, the event and engagement data your product needs, the controls that protect delivery, and the price at your volume.
Documented evidence, not inferred claims
A check appears only where the provider’s product or pricing documentation confirms the capability. “Not publicly documented” marks an evidence gap—not a claim that the provider lacks it.
Apollo Signal
Apollo Signal

Pricing & Volume

Published pricing & volume availability and plan requirements across every provider.

Free tier
3,000 / mo
Starting price
Free → $15 or PAYG
Overage / 1k
$0.40 PAYG · $0.50 → $0.30

Sending & API

Published sending & api availability and plan requirements across every provider.

REST API
SMTP relay
Batch sending
Scheduled sends
Inbound processing
Template engine

Tracking

Published tracking availability and plan requirements across every provider.

Open & click tracking
Unsubscribe tracking
Custom tracking domain
Ignite+
Read engagement pixel
Ignite+
Scroll depth
Ignite+
Forwarding detection
Ignite+
BIMI logo

Deliverability

Published deliverability availability and plan requirements across every provider.

SPF / DKIM / DMARC
Auto suppression list
Bounce classification
Deliverability advisor
Ignite+
Send time optimisation
Ignite+
Multi-region
Pulse+
Dedicated IPs
Add-on / Enterprise

Webhooks & Logs

Published webhooks & logs availability and plan requirements across every provider.

Event webhooks
Signed webhooks
Realtime event stream
Ignite+
Log retention
30–365 days

Security & Support

Published security & support availability and plan requirements across every provider.

SOC 2 Type II
Not publicly documented
GDPR compliance
Not publicly documented
MFA / 2FA
SAML SSO
Enterprise
Priority support
Enterprise
Resend
Resend

Pricing & Volume

Published pricing & volume availability and plan requirements across every provider.

Free tier
3,000 / mo
Starting price
Free → $20
Overage / 1k
$0.90

Sending & API

Published sending & api availability and plan requirements across every provider.

REST API
SMTP relay
Batch sending
Scheduled sends
Inbound processing
Template engine
React Email

Tracking

Published tracking availability and plan requirements across every provider.

Open & click tracking
Unsubscribe tracking
Custom tracking domain
Not publicly documented
Read engagement pixel
Not publicly documented
Scroll depth
Not publicly documented
Forwarding detection
Not publicly documented
BIMI logo
Not publicly documented

Deliverability

Published deliverability availability and plan requirements across every provider.

SPF / DKIM / DMARC
Auto suppression list
Bounce classification
Deliverability advisor
Not publicly documented
Send time optimisation
Not publicly documented
Multi-region
All paid
Dedicated IPs
Scale ($30/mo)

Webhooks & Logs

Published webhooks & logs availability and plan requirements across every provider.

Event webhooks
Signed webhooks
Realtime event stream
Not publicly documented
Log retention
30 days

Security & Support

Published security & support availability and plan requirements across every provider.

SOC 2 Type II
GDPR compliance
MFA / 2FA
SAML SSO
Not publicly documented
Priority support
Not publicly documented
SendGrid
SendGrid

Pricing & Volume

Published pricing & volume availability and plan requirements across every provider.

Free tier
Trial only (60 days)
Starting price
$19.95 (after trial)
Overage / 1k
Plan-based

Sending & API

Published sending & api availability and plan requirements across every provider.

REST API
SMTP relay
Batch sending
Not publicly documented
Scheduled sends
Inbound processing
Template engine

Tracking

Published tracking availability and plan requirements across every provider.

Open & click tracking
Unsubscribe tracking
Custom tracking domain
Not publicly documented
Read engagement pixel
Not publicly documented
Scroll depth
Not publicly documented
Forwarding detection
Not publicly documented
BIMI logo
Not publicly documented

Deliverability

Published deliverability availability and plan requirements across every provider.

SPF / DKIM / DMARC
Auto suppression list
Bounce classification
Deliverability advisor
Not publicly documented
Send time optimisation
Not publicly documented
Multi-region
Not publicly documented
Dedicated IPs
Pro+ or add-on

Webhooks & Logs

Published webhooks & logs availability and plan requirements across every provider.

Event webhooks
Signed webhooks
Realtime event stream
Not publicly documented
Log retention
3–7 days

Security & Support

Published security & support availability and plan requirements across every provider.

SOC 2 Type II
GDPR compliance
MFA / 2FA
SAML SSO
Priority support
Not publicly documented
Mailgun
Mailgun

Pricing & Volume

Published pricing & volume availability and plan requirements across every provider.

Free tier
100 / day
Starting price
Free → $15
Overage / 1k
$1.10 – $1.80

Sending & API

Published sending & api availability and plan requirements across every provider.

REST API
SMTP relay
Batch sending
Not publicly documented
Scheduled sends
Inbound processing
Template engine
Foundation+

Tracking

Published tracking availability and plan requirements across every provider.

Open & click tracking
Unsubscribe tracking
Custom tracking domain
Not publicly documented
Read engagement pixel
Not publicly documented
Scroll depth
Not publicly documented
Forwarding detection
Not publicly documented
BIMI logo
Not publicly documented

Deliverability

Published deliverability availability and plan requirements across every provider.

SPF / DKIM / DMARC
Auto suppression list
Bounce classification
Deliverability advisor
Not publicly documented
Send time optimisation
Scale+
Multi-region
US & EU
Dedicated IPs
50k+ volume

Webhooks & Logs

Published webhooks & logs availability and plan requirements across every provider.

Event webhooks
Signed webhooks
Not publicly documented
Realtime event stream
Not publicly documented
Log retention
1–30 days

Security & Support

Published security & support availability and plan requirements across every provider.

SOC 2 Type II
Not publicly documented
GDPR compliance
Not publicly documented
MFA / 2FA
SAML SSO
Priority support
Not publicly documented
Postmark
Postmark

Pricing & Volume

Published pricing & volume availability and plan requirements across every provider.

Free tier
100 / mo
Starting price
Free → $15 (10k min)
Overage / 1k
$1.20 – $1.80

Sending & API

Published sending & api availability and plan requirements across every provider.

REST API
SMTP relay
Batch sending
Scheduled sends
Not publicly documented
Inbound processing
Template engine

Tracking

Published tracking availability and plan requirements across every provider.

Open & click tracking
Unsubscribe tracking
Custom tracking domain
Not publicly documented
Read engagement pixel
Not publicly documented
Scroll depth
Not publicly documented
Forwarding detection
Not publicly documented
BIMI logo
Not publicly documented

Deliverability

Published deliverability availability and plan requirements across every provider.

SPF / DKIM / DMARC
Auto suppression list
Bounce classification
Deliverability advisor
Not publicly documented
Send time optimisation
Not publicly documented
Multi-region
SMTP only
Dedicated IPs
$50/mo (300k+)

Webhooks & Logs

Published webhooks & logs availability and plan requirements across every provider.

Event webhooks
Signed webhooks
Not publicly documented
Realtime event stream
Not publicly documented
Log retention
45 days

Security & Support

Published security & support availability and plan requirements across every provider.

SOC 2 Type II
Not publicly documented
GDPR compliance
Not publicly documented
MFA / 2FA
Not publicly documented
SAML SSO
Not publicly documented
Priority support
Not publicly documented
Cloudflare
Cloudflare

Pricing & Volume

Published pricing & volume availability and plan requirements across every provider.

Free tier
3,000 (paid plan req.)
Starting price
$5/mo Workers Paid
Overage / 1k
$0.35 flat

Sending & API

Published sending & api availability and plan requirements across every provider.

REST API
SMTP relay
Batch sending
Not publicly documented
Scheduled sends
Not publicly documented
Inbound processing
Template engine
Not publicly documented

Tracking

Published tracking availability and plan requirements across every provider.

Open & click tracking
Not publicly documented
Unsubscribe tracking
Not publicly documented
Custom tracking domain
Not publicly documented
Read engagement pixel
Not publicly documented
Scroll depth
Not publicly documented
Forwarding detection
Not publicly documented
BIMI logo
Not publicly documented

Deliverability

Published deliverability availability and plan requirements across every provider.

SPF / DKIM / DMARC
Auto suppression list
Bounce classification
Not publicly documented
Deliverability advisor
Not publicly documented
Send time optimisation
Not publicly documented
Multi-region
Not publicly documented
Dedicated IPs
Not publicly documented

Webhooks & Logs

Published webhooks & logs availability and plan requirements across every provider.

Event webhooks
Not publicly documented
Signed webhooks
Not publicly documented
Realtime event stream
Not publicly documented
Log retention
Not publicly documented

Security & Support

Published security & support availability and plan requirements across every provider.

SOC 2 Type II
Not publicly documented
GDPR compliance
Not publicly documented
MFA / 2FA
Not publicly documented
SAML SSO
Not publicly documented
Priority support
Not publicly documented

Read the table as a shortlist, not a scorecard. Match the evidence to your requirements.

What the feature tables compare
Each row describes a published capability or plan requirement. A check means the capability is documented; written values show the relevant plan or implementation detail.
Sources and timing

Pricing and documented capabilities were verified against provider-owned pricing and product documentation on July 31, 2026 and may change. A check means the capability is documented in the reviewed sources; “Not publicly documented” is not a claim that the provider lacks the feature. Comparison uses the most cost-effective published self-serve tier at each volume.

Primary sources: Resend · SendGrid · Mailgun · Postmark · Cloudflare