OpenAI API vs Stack AI vs OpenRouter vs Together AI

Which one fits you in 2026? Traffic, pricing, input → output, tasks and community side by side.

Your tool
OpenAI API
vs
Competitor 1
Stack AI
Competitor 2
OpenRouter
Competitor 3
Together AI
Compare
4 tools · best value per row highlighted
Your tool OpenAI API
platform.openai.com
The API powering the AI ecosystem
Remove
Competitor Stack AI
stack-ai.com
Connect AI models visually
Make main Remove
Competitor OpenRouter
openrouter.ai
Every model, one endpoint
Make main Remove
Competitor Together AI
together.ai
Open-source models without infrastructure
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
15.2Mvisits/mo
6.3Kvisits/mo
22Mvisits/mo
785.1Kvisits/mo
MoM change
▲ 4.6%
▼ 57.9%
▲ 14.6%
▼ 6.4%
6-month growth
-2.4%
-93.7%
+39.6%
+1.9%
Global rank web
—
#1,700,092
#2,023
#60,843
Avg. last 3 months
15.2M
13.9K
19.5M
794.7K
Bounce rate lower is better
34%
39%
32%
42%
Pages / visit
5.4
1.8
7.7
3.2
Visit duration
3m 56s
14s
6m 13s
1m 57s
Traffic sources
● Direct 82% · ● Referral 15%
—
● Direct 89% · ● Referral 10%
● Direct 77% · ● Referral 21%
OpenAI APIStack AIOpenRouterTogether AI
05.5M11M16.5M22MOpenAI API · 18.7MOpenAI API · 16.7MOpenAI API · 16.5MOpenAI API · 15.6MOpenAI API · 15.9MOpenAI API · 15.1MOpenAI API · 15.7MOpenAI API · 14.6MOpenAI API · 15.2MStack AI · 143.4KStack AI · 153.7KStack AI · 167.9KStack AI · 160KStack AI · 99.4KStack AI · 35.9KStack AI · 17.4KStack AI · 20.6KStack AI · 14.9KStack AI · 6.3KOpenRouter · 7.5MOpenRouter · 8.6MOpenRouter · 8.4MOpenRouter · 11.2MOpenRouter · 15.8MOpenRouter · 17.9MOpenRouter · 16.8MOpenRouter · 17.3MOpenRouter · 19.2MOpenRouter · 22MTogether AI · 566.8KTogether AI · 552.7KTogether AI · 645.8KTogether AI · 637.7KTogether AI · 770.2KTogether AI · 792.8KTogether AI · 756.1KTogether AI · 760.5KTogether AI · 838.4KTogether AI · 785.1K1K10K100K1M10M100MOpenAI API · 18.7MOpenAI API · 16.7MOpenAI API · 16.5MOpenAI API · 15.6MOpenAI API · 15.9MOpenAI API · 15.1MOpenAI API · 15.7MOpenAI API · 14.6MOpenAI API · 15.2MStack AI · 143.4KStack AI · 153.7KStack AI · 167.9KStack AI · 160KStack AI · 99.4KStack AI · 35.9KStack AI · 17.4KStack AI · 20.6KStack AI · 14.9KStack AI · 6.3KOpenRouter · 7.5MOpenRouter · 8.6MOpenRouter · 8.4MOpenRouter · 11.2MOpenRouter · 15.8MOpenRouter · 17.9MOpenRouter · 16.8MOpenRouter · 17.3MOpenRouter · 19.2MOpenRouter · 22MTogether AI · 566.8KTogether AI · 552.7KTogether AI · 645.8KTogether AI · 637.7KTogether AI · 770.2KTogether AI · 792.8KTogether AI · 756.1KTogether AI · 760.5KTogether AI · 838.4KTogether AI · 785.1KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Paid
Freemium
Freemium
Paid
Starting price
—
Free tier
Free tier
$1.99per month
Free tier
–
–
Free trial
–
API access
–
–
Plans
—
—
Free FreeStandard Custom/moBusiness Custom/moEnterprise Custom
Serverless Inference $0.30/usage-basedDedicated Inference GPU $3.99/usage-basedGPU Clusters $1.99/usage-basedFine-Tuning $0.34/usage-based
Capabilities input → output
Input
DocumentsImagesTextAudio
TextDocumentsData
VideoTextImagesAudio
TextImagesCodeAudio
Output
AudioCodeImagesTextVideo
Apps
VideoTextImagesAudio
ImagesVideoTextCodeAudio
Skill level
Advanced
Intermediate
Advanced
Advanced
Categories
Development & CodeAI APILarge Language Models (LLMs)
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Development & CodeAI APILarge Language Models (LLMs)
Development & CodeAI APIAI Developer ToolsOpen Source AI Models
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
6
7
5
8
APIs
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Developer tools
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Large language models
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LLM development
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Development
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Agents
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Inference
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LLM gateway
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No-code
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Workflows
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Agent creation
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–
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Business automation
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–
–
Fine-Tuning
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–
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GPU infrastructure
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–
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Models
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–
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Process automation
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–
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API integrations
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–
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Chatbot building
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Finance workflow automation
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–
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LLM comparison
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–
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 1
▲ 0
▲ 0
▲ 0
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
0
0
0
Verified listing
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Traffic figures are third-party estimates for the tool's own domain; tools sharing a domain with a bigger product are not counted. Pricing is captured from each tool's site and may lag.