toolgrep / Email & messaging / OneSignal
Alternatives to OneSignal
OneSignal: Customer engagement platform for email, push notifications, and SMS. 8 products similar to OneSignal, compared on pricing, free tier, API, MCP server, SDK and open source. 8 of 8 have a free tier, 8 of 8 have an API, 8 of 8 offer an MCP server.
- Knock
Customer engagement infrastructure for product, marketing, and transactional messaging
- SuprSend
Notification infrastructure for email, SMS, Slack, push, and in-app notifications via a single API.
- SendPulse
Multi-channel marketing automation platform with email, SMS, web push, chatbots, and a built-in CRM
- Courier
Customer messaging platform for humans and AI agents
- Brevo
Email & SMS Marketing, CRM & Automation Platform
- Pingram
Messaging APIs for emails, SMS, voice, and WhatsApp
- Unitpost
Email and SMS sending platform for developers, with API, SDKs, SMTP, and an MCP server for AI agents.
- Sender
Email marketing platform for growing businesses
Side by side
| Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|
| OneSignal | Freemium · from $19/mo | yes | yes | yes | yes | no |
| Knock | Freemium · from $0 | yes | yes | yes | yes | no |
| SuprSend | Freemium | yes | yes | yes | yes | no |
| SendPulse | Freemium · from $9.60/month (Standard plan, 500 subscribers, billed annually) | yes | yes | yes | — | no |
| Courier | Freemium | yes | yes | yes | yes | no |
| Brevo | Freemium | yes | yes | yes | yes | no |
| Pingram | Freemium · from $20/month | yes | yes | yes | yes | no |
| Unitpost | Freemium · from $0/mo (Free, 5k emails/mo); paid plans from $10/mo | yes | yes | yes | yes | no |
| Sender | Freemium · from $7/month (Standard, annual billing) | yes | yes | yes | — | no |
Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted. Similarity comes from the products' descriptions.
API
curl https://toolgrep.com/api/products/onesignal/alternatives