Dia (Atlassian) vs Microsoft Edge Copilot Mode + Journeys (now Copilot in Edge)
Dia (Atlassian) vs Microsoft Edge Copilot Mode + Journeys (now Copilot in Edge): side-by-side comparison of two browser-agent memory systems — architecture, taxonomy, license, pricing, MCP/A2A support, and direct edges.
Dia (Atlassian) · Microsoft Edge Copilot Mode + Journeys (now Copilot in Edge)
Cost & capability
| Dia (Atlassian) | Microsoft Edge Copilot Mode + Journeys (now Copilot in Edge) | |
|---|---|---|
| Capability band | competent | competent |
| Capability composite | 55 | 60 |
| Cost tier | free | — |
| $/Mtok input | 0 | — |
| $/Mtok output | 0 | — |
| Use cases | Scoped Agentic, Offline Capable, Memory Augmented Chat | Scoped Agentic, Memory Augmented Chat, Long Running Session |
Where they differ (11)
Rows where both sides have data and the values disagree — the shortlist of dimensions that actually distinguish these two systems.
| Dia (Atlassian) | Microsoft Edge Copilot Mode + Journeys (now Copilot in Edge) | |
|---|---|---|
| Capability composite | 55 | 60 |
| Use cases | Scoped Agentic, Offline Capable, Memory Augmented Chat | Scoped Agentic, Memory Augmented Chat, Long Running Session |
| Type | Local-first browser-history + @history queries | Tab-context + Journeys session-grouping |
| Created | 2024-12 (announced); 2025-06 (beta); 2025-10 (public macOS launch); acquired by Atlassian Sept 4 2025 | 2025-07-28 (Copilot Mode announced); 2025-10 (rolled out all Copilot markets) |
| Pricing | Free (no AI); paid AI tiers 'Better Answers' $20/mo (page also shows $10) and 'Better Days' $100/mo | Free in Edge (Journeys free on desktop in English markets); Browse with Copilot requires Microsoft 365 Premium (US); M365 Personal/Family/Premium get extended usage |
| Funding | total $128M raised pre-acquisition; acquired by Atlassian for $610M cash (announced 2025-09, closed 2025-10-21) | Microsoft public (MSFT); ~$3T market cap |
| Backend storage | custom | custom (Microsoft-managed) |
| Deployment | Managed-only | Managed-only (Edge browser with Microsoft account) |
| MCP | Skills can wrap MCP servers via Atlassian Forge bridge; not native | searched not found |
| Optimised for | local-first browser-history memory + @history queries | tab-context grouping into resumable Journeys |
| Anti-fit | not for non-Atlassian enterprise | not for non-Edge browsers |
At a glance
| Dia (Atlassian) | Microsoft Edge Copilot Mode + Journeys (now Copilot in Edge) | |
|---|---|---|
| Section | Browser-agent memory | Browser-agent memory |
| Tier | T1 | T1 |
| Type | Local-first browser-history + @history queries | Tab-context + Journeys session-grouping |
| Created | 2024-12 (announced); 2025-06 (beta); 2025-10 (public macOS launch); acquired by Atlassian Sept 4 2025 | 2025-07-28 (Copilot Mode announced); 2025-10 (rolled out all Copilot markets) |
| Pricing | Free (no AI); paid AI tiers 'Better Answers' $20/mo (page also shows $10) and 'Better Days' $100/mo | Free in Edge (Journeys free on desktop in English markets); Browse with Copilot requires Microsoft 365 Premium (US); M365 Personal/Family/Premium get extended usage |
| Funding | total $128M raised pre-acquisition; acquired by Atlassian for $610M cash (announced 2025-09, closed 2025-10-21) | Microsoft public (MSFT); ~$3T market cap |
| Backend storage | custom | custom (Microsoft-managed) |
| Deployment | Managed-only | Managed-only (Edge browser with Microsoft account) |
| API surface | searched not found | — |
| Embedding | locked | — |
| Multi-tenancy | hard-isolation | hard-isolation |
| MCP | Skills can wrap MCP servers via Atlassian Forge bridge; not native | searched not found |
| A2A | searched not found | searched not found |
| OpenTelemetry | searched not found | searched not found |
| Optimised for | local-first browser-history memory + @history queries | tab-context grouping into resumable Journeys |
| Anti-fit | not for non-Atlassian enterprise | not for non-Edge browsers |
Taxonomy
| Axis | Dia (Atlassian) | Microsoft Edge Copilot Mode + Journeys (now Copilot in Edge) |
|---|---|---|
| storage | file | kv |
| retrieval | extraction-pull | injection |
| persistence | long-term | cross-session |
| update | append-only | consolidation |
| unit | episode | episode |
| governance | user-controllable | user-controllable |
| conflict | none | none |
Pros & cons
Dia (Atlassian)
Pros: Skills + memory architecture explicitly modeled on how a knowledge worker re-uses repeated workflows.
Cons: Atlassian-tied product positioning narrows reach; skills require setup before memory is useful.
Microsoft Edge Copilot Mode + Journeys (now Copilot in Edge)
Pros: Journeys timeline memory — cross-tab, cross-session reconstruction of research arcs — is more sophisticated than competitor history features.
Cons: Edge browser lock-in; Microsoft account required to retain Journeys across devices.