ApolloThe AI GTM System for Go-to-Market Teams
vs
Letter AIReimagining enablement, with AI at the core
Comparison · Sales Enablement · weekly run Nov 2
Apollo vs Letter AI
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Apollo is the stronger AI pick in Sales Enablement: it has a visibility score of 4 versus 0.6 for Letter AI.
Choose Apollo if…
- You want the brand AI engines rank higher (4 vs 0.6)
- You need SOC 2 or CCPA or ISO/IEC 27001 or CASA Tier 2 or CPRA or EU-US DPF or PCI DSS coverage
- You prefer a larger, established vendor (501–1,000 employees)
- Large B2B contact database combined with prospecting and email sequencing
Choose Letter AI if…
- You need SOC 2 Type II or ISO/IEC 27001:2022 coverage
- Named a top pick for AI role-play
AI visibility side by side
Latest weekly run · Nov 2
| Metric | Apollo | Letter AI |
|---|---|---|
| Visibility score | 4% | 0.6% |
| Change vs last week | New | New |
| Rank in Sales Enablement | #19 | #37 |
| Share of voice | 1% | 0.3% |
| Mentions this run | 6 | 2 |
| 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 · Letter AI 0pp over 0 weekly runs.
Engine by engine
Apollo leads on 2 of 3 engines
ChatGPT
AI Mode
Perplexity
ApolloLetter AI
Head to head in AI answers
0 engine answers name both brands
0Apollo ranked higher
0Letter AI ranked higher
Features, pricing & fit
| Dimension | Apollo | Letter AI |
|---|---|---|
| Pricing model | Per seat | — |
| Entry price | Contact sales | — |
| Free plan | Yes | — |
| Deployment | Cloud platform | — |
| Integrations | 200+ | — |
| Compliance | GDPR, SOC 2, CCPA, ISO/IEC 27001, CASA Tier 2, CPRA, EU-US DPF, PCI DSS | SOC 2 Type II, ISO/IEC 27001:2022, GDPR |
| Support | Email support at support@apollo.io, Dedicated support on Custom plans, Sales team for Custom plan discussions | Contact Support link on website |
| Founded | 2015 | 2023 |
| Headquarters | San Francisco, CA | Chicago, IL |
| Employees | 501–1,000 | 51–200 |
| Funding | Series D · $250M raised | Series B · $51M raised |
| Best for | Sales and go-to-market teams that run prospecting, outreach and dialing and want data, AI and execution in one system | Sales and revenue enablement teams at global enterprises and growing companies that want content, training, coaching and buyer engagement in one platform. |
Plans side by side
Letter AI
Pricing not available.
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
Letter AI
- Named a top pick for AI role-play
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Apollo vs Letter AI”, https://slateindex.ai/compare/apollo-vs-letter-ai, data of Nov 2, 2026. Licence: CC BY 4.0.