Behavior-based email and push for SaaS
Customer.io sends messages based on what users actually do in your product. Founded by Colin Nederkoorn, “fundstrapped” (took some money but runs like bootstrapped). Took 18 months to hit $10k MRR, now at $100M ARR. Great for SaaS doing product-led growth.
Pros
- Powerful segmentation
- Multi-channel (email, SMS, push)
- Great for product-led growth
Cons
- Expensive for small lists
- Steep learning curve
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