Customer.io vs Mailjet
Customer.io vs Mailjet, compared side by side on 20 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: Customer.io is on 67/100 and Mailjet on 54/100.
Where each one leads
Customer.io
- our overall score: 67/100 against 54/100
- agent readiness: 75/100 against 39/100
- headcount: 514 against 48
- funding raised: $55.0M against $16.7M
- LinkedIn following: 41,008 against 7,345
Mailjet
Leads on none of the measures we hold for both companies.
At a glance
| Measure | Customer.io | Mailjet |
|---|---|---|
| What it is | Customer engagement platform. | All-in-one email platform for designing, sending, and tracking marketing and transactional emails. |
| Category | Customer Engagement Platform, Marketing Automation, MarTech, SaaS | Email Marketing, Email API, Marketing Software, SaaS |
| Sells toBusiness model | B2B | B2B |
| Offering | Platform | Software |
| Founded | 2012 | 2010 |
| Headquarters | Beaverton, United States | Paris, France |
| Status | Active | Active |
Size, funding and growth
| Measure | Customer.io | Mailjet |
|---|---|---|
| Employees | 514 | 48 |
| Total funding | $55.0M | $16.7M |
| Latest round | Series A | Series B |
| Valuation | $746M | Not published |
| LinkedIn followers | 41,008 | 7,345 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Customer.io | Mailjet |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 67/100 | 54/100 |
| Traction | 59/100 | 53/100 |
| Team | 60/100 | 70/100 |
| Community | Not published | 8/100 |
| Search visibility | 55/100 | 32/100 |
| Quality | 78/100 | 58/100 |
| Agent readinessHow well an AI agent can read and act on the site | B (75/100) | F (39/100) |
| Domain ratingLink authority, 0-100 | 81/100 | 85/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Customer.io | Mailjet |
|---|---|---|
| Hosting | Vercel | Not detected |
| CDN | Vercel | Cloudflare |
| CMS | Not detected | WordPress |
| Frameworks | Next.js, Tailwind CSS | Jquery, Tailwind CSS, Bootstrap |
| Analytics | Google Tag Manager | Not detected |
Customer.io vs Mailjet: common questions
Which is better, Customer.io or Mailjet?
On our 0-100 score Customer.io rates higher (67/100 against 54/100). 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 20 data points above: read the rows that match what you are buying for.
How do Customer.io and Mailjet compare on the numbers?
Customer.io leads on our overall score (67/100 against 54/100), agent readiness (75/100 against 39/100), headcount (514 against 48), funding raised ($55.0M against $16.7M), LinkedIn following (41,008 against 7,345).
Read the full Customer.io review and pricing or the Mailjet review and pricing. You can also browse other Customer.io alternatives we track.