Dia (Atlassian) vs Perplexity Comet
Dia (Atlassian) vs Perplexity Comet: side-by-side comparison of two browser-agent memory systems — architecture, taxonomy, license, pricing, MCP/A2A support, and direct edges.
Cost & capability
| Dia (Atlassian) | Perplexity Comet | |
|---|---|---|
| Capability band | competent | competent |
| Capability composite | 55 | 68 |
| Cost tier | free | free |
| $/Mtok input | 0 | 0 |
| $/Mtok output | 0 | 0 |
| Use cases | Scoped Agentic, Offline Capable, Memory Augmented Chat | Scoped Agentic, Memory Augmented Chat, Long Running Session |
Where they differ (8)
Rows where both sides have data and the values disagree — the shortlist of dimensions that actually distinguish these two systems.
| Dia (Atlassian) | Perplexity Comet | |
|---|---|---|
| Capability composite | 55 | 68 |
| Use cases | Scoped Agentic, Offline Capable, Memory Augmented Chat | Scoped Agentic, Memory Augmented Chat, Long Running Session |
| Type | Local-first browser-history + @history queries | Conversation across pages + browser-history memory |
| Created | 2024-12 (announced); 2025-06 (beta); 2025-10 (public macOS launch); acquired by Atlassian Sept 4 2025 | 2025-07-09 (limited launch Windows/macOS); 2025-10-02 (public release free worldwide) |
| Funding | $128M total $610M val Acquisition · 2025-09 | Perplexity $1.4B+ total raised; $21.2B valuation (Series E-6 early 2026) |
| MCP | Skills can wrap MCP servers via Atlassian Forge bridge; not native | Comet Assistant supports MCP servers via comet://settings/connectors |
| Optimised for | local-first browser-history memory + @history queries | AI-native browsing + cross-page memory |
| Anti-fit | not for non-Atlassian enterprise | not for enterprise / managed-browser environments |
At a glance
| Dia (Atlassian) | Perplexity Comet | |
|---|---|---|
| Section | Browser-agent memory | Browser-agent memory |
| Tier | T1 | T1 |
| Type | Local-first browser-history + @history queries | Conversation across pages + browser-history memory |
| Created | 2024-12 (announced); 2025-06 (beta); 2025-10 (public macOS launch); acquired by Atlassian Sept 4 2025 | 2025-07-09 (limited launch Windows/macOS); 2025-10-02 (public release free worldwide) |
| Pricing | Free + paid | Free + paid |
| Funding | $128M total $610M val Acquisition · 2025-09 | Perplexity $1.4B+ total raised; $21.2B valuation (Series E-6 early 2026) |
| Backend storage | custom | custom |
| Deployment | Managed-only | Managed-only |
| API surface | searched not found | — |
| Embedding | locked | locked |
| Multi-tenancy | hard-isolation | hard-isolation |
| MCP | Skills can wrap MCP servers via Atlassian Forge bridge; not native | Comet Assistant supports MCP servers via comet://settings/connectors |
| A2A | searched not found | searched not found |
| OpenTelemetry | searched not found | searched not found |
| Optimised for | local-first browser-history memory + @history queries | AI-native browsing + cross-page memory |
| Anti-fit | not for non-Atlassian enterprise | not for enterprise / managed-browser environments |
Taxonomy
| Axis | Dia (Atlassian) | Perplexity Comet |
|---|---|---|
| storage | file | file |
| retrieval | extraction-pull | similarity |
| persistence | long-term | long-term |
| update | append-only | append-only |
| unit | episode | episode |
| governance | user-controllable | opaque |
| 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.
Perplexity Comet
Pros: First search-engine-native browser agent — memory of past searches and tabs is part of the product premise.
Cons: Limited to what Perplexity sees; cross-browser portability is not on the roadmap.