Software · head to head
Perplexity vs DeepSeek
DeepSeek
Software
Chinese AI lab offering reasoning models via web and API
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Perplexity context window has been stealthily reduced despite prior claims of 1-million-token capacity; DeepSeek aPI pricing details not published on main site; requires visiting documentation
Where they differ
Only the attributes on which Perplexity and DeepSeek actually diverge.
| Attribute | Perplexity | DeepSeek |
|---|---|---|
| Pricing model | Unknown | freemium |
| Platforms | Web, iOS, Android, Comet (AI browser) | Web, iOS, Android, API |
| Founded | 2022 | Unknown |
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Unknown).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Perplexity
- Real-time web search
- Source citations
- Follow-up questions
- File analysis
- Browser extension
- API access
- Mobile apps
- Web support
Only in DeepSeek
Nothing recorded that Perplexity does not also cover.
What people use each for
The jobs each tool is most often brought in to do.
Perplexity
- ai tools managementnot DeepSeek
- Workflow automationnot DeepSeek
- Reportingnot DeepSeek
DeepSeek
- Cost-sensitive API access for language model applicationsnot Perplexity
- Open-weight model research and evaluationnot Perplexity
- General-purpose conversational AI as ChatGPT alternativenot Perplexity
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Perplexity
- Context window has been stealthily reduced despite prior claims of 1-million-token capacity
- Citations sometimes point to irrelevant or overly general articles that do not support the stated claims
- Weak performance on complex multi-step reasoning and deep logic compared to dedicated reasoning LLMs
- Web crawler ignores robots.txt directives and scrapes content from sites that explicitly opted out
- Pro subscription quotas and feature access quietly reduced without user notification
DeepSeek
- API pricing details not published on main site; requires visiting documentation
- Operates from China; data residency concerns for some users versus US-based competitors
- Web interface blocked by geoIP in some regions
Pricing, plan by plan
Perplexity
Free- FreeFree
- Unlimited basic searches
- 3 Pro Searches per day
- 1 Research query per month
- Pro$20/month
- Unlimited Pro Searches
- Advanced AI models
- All free features
- Pro Annual$200/year
- Unlimited Pro Searches
- Advanced AI models
- All free features
- Max$200/month
- Unlimited Pro Searches
- Labs multi-agent orchestration
- Perplexity Computer with 19 AI sub-agents
DeepSeek
Free- Web ChatFree
- Conversation access
- Latest model access
- API$null/variable
- Pay-per-token pricing
- Multiple models available
Which should you pick?
Choose Perplexity if
- You need real-time web search.
- You want to start without paying.
- You work on Web, iOS, Android, Comet (AI browser).
- You also want source citations.
Choose DeepSeek if
- You want to start without paying.
- You work on Web, iOS, Android, API.
Questions people ask
- Is Perplexity or DeepSeek better?
- Neither clearly leads. Perplexity starts at Free and DeepSeek at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Perplexity or DeepSeek?
- Perplexity starts at Free and DeepSeek at Free.
- Does Perplexity or DeepSeek run on more platforms?
- Perplexity runs on Web, iOS, Android, Comet (AI browser). DeepSeek runs on Web, iOS, Android, API.
- Can I use Perplexity for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Perplexity best used for?
- Perplexity is most often used for ai tools management, workflow automation, reporting. Of those, ai tools management and workflow automation are not what DeepSeek is typically brought in for.
- What can Perplexity do that DeepSeek cannot?
- Perplexity covers Real-time web search, Source citations, Follow-up questions, File analysis.
Answered from the vendors’ own pages
Perplexity: Is Perplexity completely free?
Perplexity has a free tier with unlimited basic searches and 3 Pro Searches per day. Pro ($20/month or $200/year) and Max ($200/month) tiers unlock more advanced features like multi-model access and unrestricted queries.
SourcePerplexity: What is the difference between Pro and Max?
Pro provides access to advanced AI models like GPT-5.2, Claude Sonnet 4.5, and Gemini 3 Pro. Max adds Labs for multi-agent orchestration, Perplexity Computer with 19 specialized AI sub-agents, and 10,000 Computer credits per month.
SourcePerplexity: Can I use Perplexity offline?
No. Perplexity requires an active internet connection for all searches. The full answer service is not available offline.
SourcePerplexity: What platforms does Perplexity support?
Perplexity is available as a web application, iOS app, Android app, and as Comet, a dedicated AI browser for mobile (Android available, iOS in development).
SourcePerplexity: How reliable are Perplexity's citations?
Citations are a key feature of Perplexity, but users report that citations sometimes point to irrelevant or overly general articles that don't directly support the claims made.
SourcePerplexity: Does Perplexity's context window match the advertised 1 million tokens?
Perplexity had promoted a 1-million-token context window, but users have reported stealth reductions in the actual context capacity without public announcement.
Source