Apollo.io vs TheirStack
Apollo.io vs TheirStack, compared side by side on 18 data points: what each one does, how big it is, what it has raised, the tech running each site, and what users report. We score both out of 100 on traction, team and visibility: Apollo.io is on 53/100 and TheirStack on 33/100.
Where each one leads
Apollo.io
- our overall score: 53/100 against 33/100
- agent readiness: 44/100 against 35/100
- domain rating: 84/100 against 47/100
- LinkedIn following: 295,171 against 1,210
TheirStack
Leads on none of the measures we hold for both companies.
At a glance
| Measure | Apollo.io | TheirStack |
|---|---|---|
| What it is | Apollo.io is an AI-powered go-to-market platform for B2B sales, offering tools for prospecting, multichannel outreach, data enrichment, and deal management to accelerate pipeline generation and close deals. | Sales and marketing intelligence platform that identifies potential customers based on technology usage and hiring signals. |
| Category | Sales Data Providers, Sales Data, Sales Engagement Platform, Sales Enablement | Sales Intelligence, Marketing Intelligence, Lead Generation, Market Research |
| Sells toBusiness model | B2B | B2B |
| Offering | Platform | Platform |
| Founded | 2017 | 2025 |
| Headquarters | San Francisco, United States | Tel Aviv, Israel |
| Status | Active | Active |
Size, funding and growth
| Measure | Apollo.io | TheirStack |
|---|---|---|
| Employees | Not published | 5 |
| LinkedIn followers | 295,171 | 1,210 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Apollo.io | TheirStack |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 53/100 | 33/100 |
| Traction | Not published | 8/100 |
| Team | 30/100 | 60/100 |
| Search visibility | 54/100 | 45/100 |
| Quality | 78/100 | Not published |
| Agent readinessHow well an AI agent can read and act on the site | D (44/100) | F (35/100) |
| Domain ratingLink authority, 0-100 | 84/100 | 47/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Apollo.io | TheirStack |
|---|---|---|
| Hosting | Netlify | Vercel |
| CDN | Cloudflare | Vercel |
| Frameworks | Next.js, Tailwind CSS | Next.js, Tailwind CSS |
| Analytics | Google Tag Manager, Amplitude | Google Tag Manager |
Product and pricing
| Measure | Apollo.io | TheirStack |
|---|---|---|
| Key features | Pipeline Builder, Living Data Network, Multichannel Outreach, AI Assistants & Scoring, Data Enrichment, Call Assistant & Conversation Intelligence | Technology Usage & Hiring Signals, Hiring signals, Technographic signals, Buying intent signals, Game-changing targeting criterias, Pains and intents |
Apollo.io vs TheirStack: common questions
Which is better, Apollo.io or TheirStack?
On our 0-100 score Apollo.io rates higher (53/100 against 33/100). The score weights traction, team, visibility and profile completeness, so it reflects company strength rather than which product suits you. We compare the two on 18 data points above: read the rows that match what you are buying for.
How do Apollo.io and TheirStack compare on the numbers?
Apollo.io leads on our overall score (53/100 against 33/100), agent readiness (44/100 against 35/100), domain rating (84/100 against 47/100), LinkedIn following (295,171 against 1,210).
Read the full Apollo.io review and pricing or the TheirStack review and pricing. You can also browse other Apollo.io alternatives we track.