# Agent Sandbox vs Vapi

Agent Sandbox records 0 monthly visits with 0% month-over-month growth and Free Trial, Paid pricing. Vapi records 662,301 monthly visits with -11.4% growth and Freemium pricing.

| Metric | [Agent Sandbox](https://openaitools.app/tool/agent-sandbox) | [Vapi](https://openaitools.app/tool/vapi) |
| :--- | :--- | :--- |
| Website URL | https://agentsandbox.co | https://vapi.ai |
| Categories | AI Agent, AI API, AI Developer Tools, AI Code Assistant | AI Agent, AI API, AI Voice Assistants, AI Developer Tools |
| Pricing Model | Free Trial, Paid | Freemium |
| Monthly Visits | 0 | 662,301 |
| MoM Growth Rate | 0% | -11.4% |
| Primary Market | Global | United States |
| Direct Visits | 0 | 377,321 |
| Review Score | 4.2 | 4.5 |
| Saved Count | 0 | 2 |
| Supported Platforms | Website | Website |

## Agent Sandbox

Agent Sandbox provides the missing "computer" for AI agents. Instead of letting an agent execute code on your own machines, you send the code to the Agent Sandbox API, which runs it in a sandboxed workspace with Python 3.11, memory and timeout limits, and no access to your infrastructure. This is the pattern behind code interpreters, data-analysis agents, and any tool-using model that needs to actually run something rather than just describe it.

The service covers the full round trip. Agents can install the libraries they need, which are provisioned reproducibly per run; upload input data such as CSV files; and download whatever the code produces, from charts to transformed datasets. It ships as a single tool that plugs into any agent framework, client-side or server-side, via the agentsandbox-sdk Python package.

Pricing is purely consumption-based with no subscription: new users who sign in with Google receive $10 in free credits (roughly 11 hours of compute), compute costs $0.00025 per second billed by the second, and output file storage costs $0.0005 per MB. Credits are bought in amounts from $5 to $1,000, and a dashboard tracks balance, usage history, and spending. The platform documents compatibility with Claude Code, Codex, Cursor, Windsurf, and Cline.

**Pricing & Plans:** Pay-as-you-go with no subscription. New users get $10 in free credits on Google sign-in (~11 hours of compute); compute is $0.00025/second (billed per second) and output storage is $0.0005/MB. Credits can be purchased in $5–$1,000 increments.

- **Sandboxed Python and Bash execution:** Run real Python 3.11 and shell commands inside an isolated workspace with memory and timeout limits, keeping untrusted code off your own machines.
- **Automatic dependency installation:** List the libraries or system tools your agent needs and they are installed automatically and reproducibly for that run.
- **File upload and artifact retrieval:** Send input data for processing and download everything the agent creates, including charts, logs, reports, and transformed datasets.
- **Drop-in agent integration:** Use it as a single tool inside any agent framework with the agentsandbox-sdk, working client-side or server-side with minimal setup.
- **Usage dashboard and per-second billing:** Track balance, usage history, and spending patterns, with compute charged per second and no commitments.

**Strengths:** Genuinely isolated execution with memory and timeout limits; Usage-based pricing with per-second billing and no subscription commitment; Handles dependencies, files, and artifacts in one API; Works with popular agent tools including Claude Code, Codex, Cursor, Windsurf, and Cline

**Limitations:** Requires developer effort to wire the SDK into an existing agent stack; Costs scale with compute seconds, so long-running code can add up; Sandbox limits (memory, timeout) may not suit heavy workloads

[Profile (Markdown)](https://openaitools.app/tool/agent-sandbox.md)

## Vapi

Vapi gives engineering teams a managed stack for real-time voice agents. Rather than stitching together a speech-to-text provider, an LLM, a text-to-speech vendor and a telephony carrier, teams configure those pieces through Vapi's API and dashboard. The platform handles the low-latency orchestration, barge-in handling, and call routing that make a natural back-and-forth conversation possible.

Beyond the raw API, Vapi ships observability and evaluation tooling: call logs, transcripts, effectiveness and compliance monitoring, and call simulation so agents can be tested before they reach customers. Integration hooks let agents read and write to CRMs, calendars, ticketing systems and internal APIs, which is what turns a demo bot into a working support or scheduling agent.

Vapi targets both individual builders who start on free credits and enterprises that need contractual SLAs, SSO/OAuth/RBAC, HIPAA-eligible handling and dedicated engineering support. Pricing is metered by the minute, with model costs passed through at provider rates.

**Pricing & Plans:** Usage-based. New accounts get $5 in free credits; Vapi hosting is prepaid at about $0.05/min with transcription, LLM and voice billed as pass-through provider costs. Optional success packages: Core at $29/month, Pro at 10% of hosting fees with a $999/month minimum, and a custom Premier tier for enterprises. Add-ons include extra concurrency at $10/line/month and HIPAA handling at $2,000/month.

- **Unified voice agent API:** Configure speech recognition, an LLM reasoning layer and text-to-speech through one API instead of integrating several vendors separately.
- **Managed low-latency orchestration:** The platform handles real-time audio streaming, interruption handling and call state so conversations feel natural and responsive.
- **Built-in telephony and numbers:** Provision Vapi phone numbers or bring Twilio, Vonage or Telnyx, and support both inbound and outbound calling from the same agent.
- **Testing and observability:** Simulate calls before launch, then track transcripts, effectiveness metrics and compliance signals across every production call.
- **Enterprise controls:** SOC 2, HIPAA and PCI aligned options, SSO, OAuth2, RBAC, zero data retention, uptime SLAs and dedicated deployment support.

**Strengths:** API-native design with full control over models, prompts and voices; Real-time infrastructure, telephony and monitoring handled for you; Transparent pricing with model costs passed through at provider rates; Strong enterprise feature set including compliance, SSO, RBAC and SLAs

**Limitations:** Total cost climbs quickly because hosting, models and transport are billed separately; The Pro success package has a high $999/month minimum; Advanced configuration assumes real development resources

[Profile (Markdown)](https://openaitools.app/tool/vapi.md)

## Frequently Asked Questions

### How do Agent Sandbox and Vapi compare in monthly traffic?

Agent Sandbox has 0 monthly visits, while Vapi has 662,301. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Agent Sandbox has a month-over-month growth rate of 0%; Vapi has -11.4%.

### How does pricing compare?

Agent Sandbox: Free Trial, Paid. Pay-as-you-go with no subscription. New users get $10 in free credits on Google sign-in (~11 hours of compute); compute is $0.00025/second (billed per second) and output storage is $0.0005/MB. Credits can be purchased in $5–$1,000 increments. Vapi: Freemium. Usage-based. New accounts get $5 in free credits; Vapi hosting is prepaid at about $0.05/min with transcription, LLM and voice billed as pass-through provider costs. Optional success packages: Core at $29/month, Pro at 10% of hosting fees with a $999/month minimum, and a custom Premier tier for enterprises. Add-ons include extra concurrency at $10/line/month and HIPAA handling at $2,000/month.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [OpenAI Platform](https://openaitools.app/tool/openai) | 234,678,639 | -9.6% | Paid | Provides raw frontier language models and real-time multimodal capabilities, requiring custom scaffolding compared to Vapi's voice workflows. | [.md](https://openaitools.app/tool/openai.md) |
| 2 | [Google AI Studio](https://openaitools.app/tool/google-ai-studio) | 112,620,020 | +2% | Freemium | Offers developer access to Gemini's powerful multimodal APIs, but lacks out-of-the-box telephony voice agent pipelines. | [.md](https://openaitools.app/tool/google-ai-studio.md) |
| 3 | [ElevenLabs](https://openaitools.app/tool/elevenlabs-io) | 42,396,771 | +26.1% | Freemium, Paid, Contact for Pricing | Industry leader in ultra-realistic voice cloning and text-to-speech, now offering robust conversational voice agent capabilities. | [.md](https://openaitools.app/tool/elevenlabs-io.md) |
| 4 | [Composio](https://openaitools.app/tool/composio) | 2,782,603 | +22.8% | Freemium, Contact for Pricing | Give your AI agents secure, authenticated access to 1,700+ apps | [.md](https://openaitools.app/tool/composio.md) |
| 5 | [Pi Coding Agent](https://openaitools.app/tool/pi-coding-agent) | 1,929,244 | +4% | Free | A minimal, extensible terminal coding agent you can reshape | [.md](https://openaitools.app/tool/pi-coding-agent.md) |
| 6 | [Cartesia](https://openaitools.app/tool/cartesia-ai) | 1,782,707 | +49.7% | Contact for Pricing | Provides ultra-low latency text-to-speech and managed voice agents via developer API, rivaling Vapi's audio speed. | [.md](https://openaitools.app/tool/cartesia-ai.md) |
| 7 | [Deepgram Voice AI](https://openaitools.app/tool/deepgram-voice-ai) | 863,852 | +31.8% | Free Trial | Delivers robust real-time speech-to-text and voice agent APIs, though with less telephony-specific orchestration than Vapi. | [.md](https://openaitools.app/tool/deepgram-voice-ai.md) |
| 8 | [BLACKBOX.AI](https://openaitools.app/tool/blackbox-ai-1) | 622,975 | -27.2% | Free Trial, Paid | High-trust frontier inference, encrypted end to end | [.md](https://openaitools.app/tool/blackbox-ai-1.md) |
| 9 | [AssemblyAI](https://openaitools.app/tool/assemblyai) | 453,591 | -6.9% | Freemium, Contact for Pricing | Provides enterprise-grade speech-to-text and audio intelligence APIs, but lacks turnkey conversational voice agent telephony orchestration. | [.md](https://openaitools.app/tool/assemblyai.md) |
| 10 | [Merge](https://openaitools.app/tool/merge-dev) | 313,201 | +1.7% | Freemium, Contact for Pricing | The universal context engine connecting agents to data, tools, and models | [.md](https://openaitools.app/tool/merge-dev.md) |

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Source: https://openaitools.app/compare/agent-sandbox-vs-vapi

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