SMTP.com is a reliable email relay API and delivery platform, offering scalable plans from $25/month for 50k emails.
Free·from $25/mo
Best Knock Alternatives
We compared 8 alternatives to Knock in Communication. Each is hand-picked and ranked by our rating — pricing and features verified, no fluff.
Knock: Knock is AI-native customer engagement infrastructure for building and shipping cross-channel messaging. Read the full Knock review →
Geekbot automates async standups, polls, and surveys in Slack or Microsoft Teams—free for teams up to 10 users.
Free·from $2.5/participant/mo
IGdm Pro is a desktop app for Instagram DM automation, bulk messaging, and inbox management on Mac, PC, or Linux.
Free·from $8.99/mo
Livestorm is browser-based video conferencing for webinars and meetings, with built-in analytics and CRM integrations, no downloads required.
Free·from €2.50/attendee
Proton offers end-to-end encrypted email, calendar, VPN, and storage with a free tier and paid plans from $3.99/mo.
Free · from $3.99/mo for Mail Plus · from $9.99/mo for Proton Unlimited
Sendspark records and shares personalized videos with AI voice cloning and viewer analytics for B2B sales teams.
Free·from $49/mo
Ahasend Com ◆
Ahasend Com is a European transactional email API with fair pricing and a free tier for developers.
from $0 (free tier)
ClickMeeting is a webinar platform for live, automated, and paid events with breakout rooms, monetization, and e-learning tools – no installation needed.
Free·from €25/mo
◆ AI advisor — 30 seconds, no signup
Why are you looking at Communication tools today?
Knock vs alternatives: quick comparison
| Tool | Starting price | Free plan | Category | |
|---|---|---|---|---|
| Knock (this tool) | from $0/mo | No | Communication | Learn more → |
| SMTP | from $25/mo | Yes | Communication | Learn more → |
| Geekbot | from $2.5/participant/mo | Yes | Communication | Learn more → |
| IGdm Pro | from $8.99/mo | Yes | Communication | Learn more → |
| Livestorm | from €2.50/attendee | Yes | Communication | Learn more → |
| Proton | Free · from $3.99/mo for Mail Plus · from $9.99/mo for Proton Unlimited | Yes | Communication | Learn more → |
| Sendspark | from $49/mo | Yes | Communication | Learn more → |
| Ahasend Com | from $0 (free tier) | Yes | Communication | Learn more → |
| ClickMeeting | from €25/mo | Yes | Communication | Learn more → |
Prices and details are generated automatically and may not be up to date. For accurate information, please visit the official website of the tool you are interested in.
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