| Price from | $29.99/mo | $5/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Linux | — | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 10 | 10 |
| Spec score · Backend as a Service (BaaS) Software | 8.4 (#3) | 8.6 (#2) |
| Integrations | The platform page lists Stripe, OpenAI, Google, AWS and SendGrid as third-party integrations and says users can add any third-party API key. | Webhooks can connect Back4app to external services, and the API page names Slack, Zapier, and payment processors as integration examples. |
| Product | 23blocks provides pre-built backend blocks with APIs so developers can use backend services without building the infrastructure themselves. | Back4app describes itself as a low-code backend platform with databases, authentication, APIs, real-time sync, file storage, and AI-powered development tools. |
| Security | The DPA describes TLS 1.2 minimum and TLS 1.3 preferred for data in transit, AES-256 or equivalent encryption at rest, least-privilege IAM and required MFA for administrative access. | The pricing page lists SOC 2 Type 2 and ISO 27001 for Pay As You Go and Dedicated, and HIPAA after a BAA is signed for Dedicated. |
| Support | The pricing page says the 1.5× deployment multiplier covers provisioning, monitoring, upgrades and support for dedicated single-tenant deployments. | The backend pricing comparison lists community and email/ticket support, with priority support and scheduled calls listed for Dedicated. |
