Side-by-side
Customer.io vs Knock
Pricing, founders, indie status and curated alternatives compared from our directory — all data points sourced from each tool's public site or press materials.
At a glanceCustomer.ioKnock
At a glance
- Pricing
- Customer.io$100/mo (Essentials)
- Knock$99/mo (Starter)
- Pricing model
- Customer.ioPaid
- KnockFreemium
- Founded
- Customer.io2012
- Knock2020
- Location
- Customer.io—
- Knock—
- Bootstrapped
- Customer.io—
- Knock—
- Open source
- Customer.io—
- Knock—
- Category
- Customer.ioMarketing Automation
- Knock—
- Indie alternatives
- Customer.io4
- Knock0
- Founders
- Customer.ioColin Nederkoorn, John Allison
- KnockChris Bell, Sam Seely
Key differences
Pricing
Knock starts cheaper at $99/mo (Starter); Customer.io starts at $100/mo (Essentials).
Funding
Both are venture-backed.
Founded
Customer.io (2012) is 8 years older than Knock (2020).
Indie alternatives
Customer.io has 4 curated indie alternatives in our directory; Knock has 0.
Differences are derived directly from the data on each tool's page. Empty fields mean we haven't verified a value yet — never that one tool lacks the capability.
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Discussion
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