ApolloThe AI GTM System for Go-to-Market Teams
vs
PostmarkThe email delivery service that people actually like
Comparison · Email Marketing · weekly run Nov 2
Apollo vs Postmark
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Postmark is the stronger AI pick in Email Marketing: it has a visibility score of 1.9 versus 0.4 for Apollo.
Choose Apollo if…
- You need SOC 2 or CCPA or ISO/IEC 27001 or CASA Tier 2 or CPRA or EU-US DPF or PCI DSS coverage
- Per seat pricing suits your budget better than usage-based
- Large B2B contact database combined with prospecting and email sequencing
- Transparent self-serve per-user pricing with a free tier
Choose Postmark if…
- You want the brand AI engines rank higher (1.9 vs 0.4)
- Usage-based pricing suits your budget better than per seat
- recommended for transactional email
- suited to reliable transactional email
AI visibility side by side
Latest weekly run · Nov 2
| Metric | Apollo | Postmark |
|---|---|---|
| Visibility score | 0.4% | 1.9% |
| Change vs last week | New | New |
| Rank in Email Marketing | #40 | #29 |
| Share of voice | 0.3% | 0.9% |
| Mentions this run | 1 | 5 |
| Positive in AI answers | 60% | — |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Apollo 0pp · Postmark 0pp over 0 weekly runs.
Engine by engine
Postmark leads on 2 of 3 engines
ChatGPT
AI Mode
Perplexity
ApolloPostmark
Head to head in AI answers
0 engine answers name both brands
0Apollo ranked higher
0Postmark ranked higher
Features, pricing & fit
| Dimension | Apollo | Postmark |
|---|---|---|
| Pricing model | Per seat | Usage-based |
| Entry price | Contact sales | Free; paid from $15 / mo |
| Free plan | Yes | Yes |
| Deployment | Cloud platform | Cloud |
| Integrations | 200+ | — |
| Compliance | GDPR, SOC 2, CCPA, ISO/IEC 27001, CASA Tier 2, CPRA, EU-US DPF, PCI DSS | GDPR |
| Support | Email support at support@apollo.io, Dedicated support on Custom plans, Sales team for Custom plan discussions | Contact form |
| Founded | 2015 | 2010 |
| Headquarters | San Francisco, CA | — |
| Employees | 501–1,000 | — |
| Funding | Series D · $250M raised | — |
| Best for | Sales and go-to-market teams that run prospecting, outreach and dialing and want data, AI and execution in one system | Developers and product teams that need reliable transactional email |
Plans side by side
Postmark
Free$0month
Basic$15month
Pro$16.5month
Platform$18month
High volumeCustomcustom
Pros and cons
Themes from the AI answers that mention each brand
Apollo
- Large B2B contact database combined with prospecting and email sequencing
- Transparent self-serve per-user pricing with a free tier
- Strong all-in-one value for prospecting and outreach
- Affordable, reliable choice for small teams and startups
- Widely used and highly rated by reviewers
Postmark
- recommended for transactional email
- suited to reliable transactional email
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Apollo vs Postmark”, https://slateindex.ai/compare/apollo-vs-postmark, data of Nov 2, 2026. Licence: CC BY 4.0.