The verdict
On the data we hold, Customer.io comes out ahead. Here is why, point by point.
What the data says
- Both cover 3 of the 3 features we compared.
- Both have an API and an MCP server, so either works with AI employees.
- In our Keep customers longer ranking, Customer.io places 6 and Gainsight 2 of 14.
Side by side
| 7 points compared | ||
|---|---|---|
| Starts at | $100/mo | Not known yet |
| Free plan | No | Not known yet |
| API | Yes | Yes |
| MCP server | Yes | Yes |
| In-app guides and messages | Yes | Yes |
| NPS and CSAT surveys | Yes | Yes |
| Usage-triggered messages | Yes | Yes |
| Links |
Plans and pricing
Customer.io
- EssentialsFrom $100 a month billed monthly; 5,000 profiles and 1 million emails a month included.$100/mo
- PremiumFrom $1,000 a month billed yearly, with custom profile and email volume.$12,000/yr
Gainsight
Pricing not in our catalogue yet.
Prices as the vendors list them. They change often; the final price is on their sites.
Who each is for
Choose Customer.io if…
Product and lifecycle teams at SaaS and consumer apps that want behaviour-triggered messages across email, SMS, push and in-app, and have an engineer or data-minded marketer to wire up events.
Choose Gainsight if…
A mid-market or enterprise B2B SaaS company with separate customer success, product and community teams that wants one connected suite to track account health and renewals.
Other options worth a look
Tool·Value creationSpots churn risk early with health scoring, automated plays, and renewal forecasting for subscription businesses.Keep customers longer
Tool·Value creationBrings customer data, usage and health scores together so B2B teams can onboard, retain and grow accounts.Keep customers longer
Tool·Value creationConsolidates customer data, health scoring and team workflows in one workspace for customer success.Keep customers longer
Tool·Value creationTrack product usage and account health to flag churn risk and automate customer retention workflows.Keep customers longer
Free plan
Tool·Value creationCentralises customer data from CRM, billing and support tools to reveal churn risk and growth opportunities.Keep customers longer
Tool·Value creationManages recurring billing and payment recovery across multiple currencies and gateways for subscription businesses.Keep customers longer
From $249/mo