Knock
Customer engagement infrastructure for product-led growth, enabling cross-channel messaging and data activation.
Updated: February 2026
Best software tools for startups and early-stage companies. Find affordable, scalable solutions to launch and grow your business. We've curated 8 tools specifically suited for startups.
Customer engagement infrastructure for product-led growth, enabling cross-channel messaging and data activation.
Empowering B2B marketers with a unified platform for customer journey activation and attribution.
Transform customer data into high-converting campaigns with advanced segmentation and omnichannel messaging.

Personalize billions of user experiences daily with real-time customer data.
Based on our analysis, Knock is the top choice for startups, with a score of /100.
Yes! Knock, Movio, Dreamdata offer free plans suitable for startups.