Airship vs Medium vs OneSignal vs Substack
| Attribute | ||||
|---|---|---|---|---|
| Category | Marketing | Content & Writing | Email & Messaging Marketing | Email & Messaging Marketing |
| Pricing | Paid | Free tier | Free tier | Free tier |
| Starting price | — | $5/month | $99/month | $10/month |
| Free tier | No | Yes | Yes | Yes |
| Free trial | No | No | Yes | No |
| Deployment | — | Cloud | — | — |
| API available | Unknown | Unknown | Unknown | Unknown |
| Platforms | — | — | — | — |
| Certifications | — | — | — | — |
| Integrations | — | — | — | — |
| Company | — | Founded 2012 | Founded 2011 | Founded 2017 |
| Feature attributes | ||||
Also consider
Unknown values show as “Unknown”/“—”. Nothing is inferred — see each tool page for sources.