kitio.aiPerplexity API Platform vs Zep
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Perplexity API Platform starts at See pricing page and Zep starts at $125/mo. Check both pricing pages for current plans.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Sonar answer models
- Search API
- Agent API
- Source citations
- Pay-as-you-go billing
- Temporal knowledge graph
- Entity extraction
- Context assembly
- Graphiti open source
- Python, TS and Go SDKs
| Feature | Perplexity API Platform | Zep |
|---|---|---|
| Best for | Search-grounded model APIs for adding cited web answers to apps | Context engineering platform with temporal knowledge graph memory |
| Category | Models & APIs | Models & APIs |
| Pricing model | Paid | Freemium |
| Starting price | See pricing page | $125/mo |
| Free plan | No | Yes |
| Made by | Perplexity | Zep AI |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Perplexity API Platform starts at See pricing page and Zep starts at $125/mo. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Flex
$125/mo
- 50,000 credits/mo, then $25/10K
- 600 requests per minute
- 5 projects
- Unlimited memories and users
Flex Plus
$375/mo
- 200,000 credits/mo, then $75/40K
- 1,000 requests per minute
- 10 projects
- HIPAA BAA
Enterprise
Custom
- Custom credits, negotiated rates
- Zep Cloud or your VPC
- Guaranteed rate limits with SLA
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Perplexity API Platform
- Answers come with sources
- No search index to build
- Simple usage pricing
- Two-part pricing is easy to misjudge
- Less control over sources
- Costs climb with deep search
Zep
- Tracks how facts change
- Open-source graph engine
- Good for business data
- Hosted platform is cloud only
- Graph concepts take learning
- Credit pricing needs tracking
Which one should you choose?
Choose Perplexity API Platform if you want:
- Answers come with sources
- No search index to build
- Simple usage pricing
Watch out: two-part pricing is easy to misjudge.
Choose Zep if you want:
- Tracks how facts change
- Open-source graph engine
- Good for business data
Watch out: hosted platform is cloud only.
Perplexity API Platform vs Zep FAQ
What is the difference between Perplexity API Platform and Zep?
Perplexity API Platform: Search-grounded model APIs for adding cited web answers to apps. Zep: Context engineering platform with temporal knowledge graph memory. Both are models & apis tools.
Is Perplexity API Platform or Zep cheaper?
Perplexity API Platform starts at See pricing page and Zep starts at $125/mo. Check both pricing pages for current plans.
Do Perplexity API Platform and Zep have free plans?
Perplexity API Platform: No. Zep: Yes.
Who makes Perplexity API Platform?
Perplexity API Platform is made by Perplexity, based in United States.
Who makes Zep?
Zep is made by Zep AI, based in United States.
Which should I choose, Perplexity API Platform or Zep?
Choose Perplexity API Platform if you value answers come with sources and no search index to build. Choose Zep if you value tracks how facts change and open-source graph engine.