Which is cheaper, Customer.io or SendGrid?

SendGrid is 5.0x cheaper than Customer.io. Customer.io starts at $100/mo, SendGrid starts at $0/mo.

Does Customer.io have a free tier?

No, Customer.io does not have a free tier.

Customer.io has significant switching cost. SendGrid has drop-in switching cost. SendGrid is easier to switch away from.

Customer.io

Automated messaging platform for targeted emails, push notifications, SMS, and in-app messages based on user behavior

Switching Cost: significant

SendGrid

← More affordable

Cloud-based email delivery platform for transactional and marketing emails with analytics and template management

Switching Cost: drop-in

Budget-wise, SendGrid is clearly more affordable at roughly a 5.0x price difference.

Startups take note: SendGrid provides a free tier, while Customer.io requires payment from day one.

Pricing philosophy differs — Customer.io charges tiered, but SendGrid takes a flat-rate approach.

If budget is your primary constraint, SendGrid is the clear winner with its more wallet-friendly pricing structure.

If budget is your primary constraint, SendGrid is the clear winner with its more wallet-friendly pricing structure.

Price Difference

5.0x

SendGrid is cheaper by $80.05/mo

Free Tier

SendGrid

Has a free tier option

Pricing Model

Different

Tools charge using different pricing philosophies

Switching Costs

SendGrid

Lower switching costs for easier migration