AssemblyAI vs Vertex AI: Pricing Comparison 2026
Side-by-side pricing comparison of AssemblyAI and Vertex AI. See all plans, features, and costs at a glance.
Bottom line: AssemblyAI starts at Custom pricing and Vertex AI starts at $2/mo. Compare all 14 pricing tiers side by side.
Last updated: July 6, 2026
AssemblyAI vs Vertex AI: Quick Pricing Facts
| Feature | AssemblyAI | Vertex AI |
|---|---|---|
| Starting Price | Custom pricing | $2/mo |
| Number of Plans | 2 | 12 |
| Free Tier | Yes | No |
| Pricing Model | usage-based | usage-based |
| Annual Discount | N/A | N/A |
AssemblyAI and Vertex AI are both priced at Custom pricing, making them equally accessible AI & ML tools. Together they offer 14 pricing plans with 0 features compared, so the best choice comes down to which features match your needs.
AssemblyAI stands out with a free plan for getting started.
Review the detailed tier-by-tier comparison above to see exactly which features are included at each price point and find the best fit for your AI & ML needs.
| Pricing Plans |  AssemblyAI Try free |  Vertex AI Try free |
|---|---|---|
| Tier 1 | Free $0/monthCheapest | cached Custom pricing |
| Tier 2 | Pay as you go Custom pricing | $14 per 1,000 search queries $14/monthCheapest |
| Tier 3 | - | $14 per 1,000 queries $14/monthCheapest |
| Tier 4 | - | Gemini 2.0 Flash $2/monthCheapest |
| Tier 5 | - | $45 per 1,000 grounded prompts $45/monthCheapest |
| Tier 6 | - | $25 per 1,000 grounded prompts $25/monthCheapest |
| Tier 7 | - | Gemini Flash Custom pricing |
| Tier 8 | - | $35 per 1,000 grounded prompts $35/monthCheapest |
| Tier 9 | - | Model Custom pricing |
| Tier 10 | - | Open Source Model Custom pricing |
| Tier 11 | - | Duration Custom pricing |
| Tier 12 | - | $10 per 1000 searches $10/monthCheapest |
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Which Should You Choose?
Choose AssemblyAI if:
- •Your application specifically needs audio transcription and speech intelligence features
- •AssemblyAI's dedicated audio models provide better accuracy and more audio-specific features
- •A specialized audio AI API is preferable to a general-purpose cloud AI platform
Choose Vertex AI if:
- •Your organization is on Google Cloud and wants a unified AI platform for multiple modalities
- •Vertex AI's managed training, MLOps tools, and Gemini model access are required
- •GCP-native integration and compliance certifications are priorities for your organization
AssemblyAI is a specialized audio AI API. Vertex AI is Google Cloud's comprehensive AI platform covering training, serving, and model access. Vertex AI includes Speech-to-Text capabilities, but AssemblyAI's specialized audio models often provide better accuracy and more audio intelligence features. For GCP-native organizations that want everything under one cloud umbrella, Vertex AI is the practical choice. For teams that want best-in-class audio AI regardless of cloud provider, AssemblyAI is worth the additional integration.
Frequently Asked Questions: AssemblyAI vs Vertex AI
How many pricing plans does AssemblyAI have vs Vertex AI?
Does AssemblyAI or Vertex AI offer a free plan?
Does AssemblyAI or Vertex AI offer custom enterprise pricing?
How do AssemblyAI and Vertex AI compare for AI & ML?
Sources
- AssemblyAI Official Pricing- Vendor pricing page
- Vertex AI Official Pricing- Vendor pricing page
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