LLMs & Assistants
DeepSeek vs Microsoft Copilot.
Both sit in LLMs & Assistants, scored on the same six pillars from the same published methodology. Here is where they actually differ.
The short answer
Microsoft Copilot scores higher — 87.0 against 83.6, a margin of 3.4 points. That is the overall answer, not the whole one: the pillar breakdown below is where the decision usually actually gets made.
DeepSeek leads on value for money and momentum; Microsoft Copilot leads on security & compliance, maturity & reliability and integrations & ecosystem.
DeepSeek AI
83.6
Excellent
Open-weight frontier models at a fraction of the usual cost.
- From
- Free (open weights) / low-cost API
- Pricing
- Open Source
- Maturity
- Emerging
- Founded
- 2023
Microsoft
87.0
Excellent
AI assistant woven through Windows, Microsoft 365 and Edge.
- From
- Free / $30 per user per month (M365)
- Pricing
- Freemium
- Maturity
- Mature
- Founded
- 2023
Pillar by pillar
The same six pillars and fixed weights used for every tool on the site. A lead of fewer than 5 points is not called for either side — these are evidence-backed judgements, not measurements. Read the methodology.
Capability
Level
Value for Money
DeepSeek by 15
Security & Compliance
Microsoft Copilot by 20
Integrations & Ecosystem
Microsoft Copilot by 16
Maturity & Reliability
Microsoft Copilot by 18
Momentum
DeepSeek by 6
Which one, and when
Pick DeepSeek if
- →cost per unit of output is the binding constraint — it leads Value for Money by 15 points.
- →where the product will be in a year matters as much as today — it leads Momentum by 6 points.
- →Cost-sensitive AI workloads
- →Self-hosted frontier reasoning
- →Teams fine-tuning open models
The catch
- Hosted service raises data-residency questions for regulated buyers
- Enterprise support and certifications lag Western labs
Pick Microsoft Copilot if
- →compliance and data control decide it — it leads Security & Compliance by 20 points.
- →it has to hold up in production from day one — it leads Maturity & Reliability by 18 points.
- →it has to fit the stack you already run — it leads Integrations & Ecosystem by 16 points.
- →Microsoft 365 organizations
- →Enterprise rollouts needing compliance
- →Productivity in Office workflows
The catch
- Best value only inside the Microsoft ecosystem
- M365 Copilot seat cost adds up org-wide
What each is good at
DeepSeek
- ✓Frontier-class reasoning and coding at a small fraction of the cost
- ✓Open weights allow self-hosting, fine-tuning and full data control
- ✓API pricing undercuts most closed competitors substantially
Microsoft Copilot
- ✓Deep integration across the Microsoft stack
- ✓Enterprise security, compliance and admin controls
- ✓Grounded in your organization's documents and mail
Other comparisons in LLMs & Assistants
Comparing something else? Build your own side-by-side across any tools in the catalog.