---
canonical: https://thejudex.com/vs/ably-realtime-vs-pubnub
title: Ably Realtime vs PubNub
type: SoftwareComparison
updatedAt: 2026-10-29T01:33:52.118Z
---

# Technical Comparison: Ably Realtime vs PubNub

> Ably Realtime and PubNub are global pub/sub messaging infrastructure platforms for concurrent applications. Ably focuses on strict message ordering guarantees and edge architecture. PubNub offers a superior availability SLA and over 50 SDKs, integrating native serverless capabilities across its global network.

## Capabilities and Pricing Summary

| Dimension | Ably Realtime | PubNub |
| :--- | :--- | :--- |
| Pricing Model | FREEMIUM | FREEMIUM |
| Starting Price | Free / Contact vendor | Free / Contact vendor |
| Technical Rating | 4.6/5.0 | 4.6/5.0 |
| Verification | Verified | Verified |
| Markdown Card | [Ably Realtime.md](https://thejudex.com/tool/ably-realtime.md) | [PubNub.md](https://thejudex.com/tool/pubnub.md) |

## Key Differentiators

- Strict delivery and ordering guarantees in Ably
- 99.999% availability SLA in PubNub
- Integrated serverless functions in PubNub
- Global edge network optimized for low latency

## Switching Cost and Bidirectional Migration Friction (MFI)

| Migration Route | MFI Index (0-100) | Rating | Audited Critical Factors |
| :--- | :---: | :--- | :--- |
| From Ably Realtime to PubNub | 70/100 | Alto Lock-in | Ably Realtime carece de exportación masiva nativa de datos documentada, lo que incrementa el riesgo de vendor lock-in.; PubNub no expone API pública para sincronización automatizada, requiriendo importaciones manuales. |
| From PubNub to Ably Realtime | 70/100 | Alto Lock-in | PubNub carece de exportación masiva nativa de datos documentada, lo que incrementa el riesgo de vendor lock-in.; Ably Realtime no expone API pública para sincronización automatizada, requiriendo importaciones manuales. |

> MFI Verdict: La fricción de migración es simétrica (70/100 en ambas direcciones). Ambas plataformas exhiben barreras de cambio comparables en términos de exportación, APIs públicas y continuidad de credenciales.

## Technical Feature Matrix

| Feature | Ably Realtime | PubNub |
| :--- | :---: | :---: |
| REST & GraphQL API | Yes | Yes |
| SSO / SAML Authentication | Yes | Yes |
| Self-Hosted Option | No | No |
| Full Data Export | Yes | Yes |
| Role-Based Access Control (RBAC) | Yes | Yes |
| Custom Domains & SSL | Yes | No |
| Immutable Audit Logs | Yes | Yes |

## Frequently Asked Questions

### Q: What is the main difference between Ably Realtime and PubNub?
A: Ably Realtime and PubNub are global pub/sub messaging infrastructure platforms for concurrent applications. Ably focuses on strict message ordering guarantees and edge architecture. PubNub offers a superior availability SLA and over 50 SDKs, integrating native serverless capabilities across its global network.

### Q: Which is more affordable, Ably Realtime or PubNub?
A: Ably Realtime has a starting price of Free / Contact vendor, while PubNub starts from Free / Contact vendor.

## Canonical Resources

- Web Comparison: https://thejudex.com/vs/ably-realtime-vs-pubnub
- AEO Markdown Format: https://thejudex.com/vs/ably-realtime-vs-pubnub.md
- Profile of Ably Realtime: https://thejudex.com/tool/ably-realtime
- Profile of PubNub: https://thejudex.com/tool/pubnub