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AI Tools · head to head

DeepSeek vs Perplexity

DeepSeek logo

DeepSeek

AI Tools

Chinese AI lab offering reasoning models via web and API

From
Free
Rated
-
Full reviewWebsite
Perplexity logo

Perplexity

AI Tools

AI-powered answer engine with citations

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: DeepSeek aPI pricing details not published on main site; requires visiting documentation; Perplexity context window has been stealthily reduced despite prior claims of 1-million-token capacity

Where they differ

Only the attributes on which DeepSeek and Perplexity actually diverge.

Attributes where DeepSeek and Perplexity differ
AttributeDeepSeekPerplexity
Pricing modelfreemiumUnknown
PlatformsWeb, iOS, Android, APIWeb, iOS, Android, Comet (AI browser)
FoundedUnknown2022

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (AI Tools).

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 DeepSeek

Nothing recorded that Perplexity does not also cover.

Only in Perplexity

  • Real-time web search
  • Source citations
  • Follow-up questions
  • File analysis
  • Browser extension
  • API access
  • Mobile apps
  • Web support

What people use each for

The jobs each tool is most often brought in to do.

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

Perplexity

  • ai tools managementnot DeepSeek
  • Workflow automationnot DeepSeek
  • Reportingnot DeepSeek

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

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

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

Pricing, plan by plan

DeepSeek

Free
  • Web ChatFree
    • Conversation access
    • Latest model access
  • API$null/variable
    • Pay-per-token pricing
    • Multiple models available

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

Which should you pick?

Choose DeepSeek if

  • You want to start without paying.
  • You work on Web, iOS, Android, API.
DeepSeek review

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.
Perplexity review

Questions people ask

Is DeepSeek or Perplexity better?
Neither clearly leads. DeepSeek starts at Free and Perplexity at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, DeepSeek or Perplexity?
DeepSeek starts at Free and Perplexity at Free.
Does DeepSeek or Perplexity run on more platforms?
DeepSeek runs on Web, iOS, Android, API. Perplexity runs on Web, iOS, Android, Comet (AI browser).
Can I use DeepSeek for free?
Both have a free tier, so you can try either at no cost before committing.
What is DeepSeek best used for?
DeepSeek is most often used for cost-sensitive api access for language model applications, open-weight model research and evaluation, general-purpose conversational ai as chatgpt alternative. Of those, cost-sensitive api access for language model applications and open-weight model research and evaluation are not what Perplexity is typically brought in for.
What can DeepSeek do that Perplexity 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.

Source
Perplexity: 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.

Source
Perplexity: Can I use Perplexity offline?

No. Perplexity requires an active internet connection for all searches. The full answer service is not available offline.

Source
Perplexity: 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).

Source
Perplexity: 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.

Source
Perplexity: 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
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