# CometAPI vs Manifest

CometAPI records 602,966 monthly visits with +49.7% month-over-month growth and Pay-as-you-go (credits) pricing. Manifest records 54,135 monthly visits with -23% growth and Free pricing.

| Metric | [CometAPI](https://openaitools.app/tool/cometapi) | [Manifest](https://openaitools.app/tool/manifest) |
| :--- | :--- | :--- |
| Website URL | https://www.cometapi.com | https://manifest.build |
| Categories | AI Developer Tools, AI API | Large Language Models (LLMs), AI Developer Tools, Open Source AI Models, AI API |
| Pricing Model | Pay-as-you-go (credits) | Free |
| Monthly Visits | 602,966 | 54,135 |
| MoM Growth Rate | +49.7% | -23% |
| Primary Market | India | United States |
| Direct Visits | 89,151 | 34,261 |
| Review Score | 4 | 4.5 |
| Saved Count | 2 | 0 |
| Supported Platforms | Website | Website |

## CometAPI

CometAPI is an aggregation layer for large language and multimodal model providers. Instead of maintaining separate accounts, keys and billing relationships with OpenAI, Anthropic, Google and a growing set of image, audio and video vendors, teams sign up once, get a single API key, and call any of 500+ models through an OpenAI-compatible base URL. Existing SDK code usually works after changing the base URL and model name, which keeps migration effort low.

The commercial pitch is straightforward: pay-as-you-go credits, line-item pricing for every model, and rates set below official vendor pricing, with the platform advertising ongoing savings of roughly 20 to 40 percent. There is no monthly subscription or minimum spend, unused credits carry forward, and the model catalog is searchable with side-by-side pricing and capability comparisons. Because model names are the only thing that changes when you switch vendors, teams gain portability if a provider raises prices or has an outage.

Operationally, CometAPI positions itself as production infrastructure rather than a demo playground. It advertises 99.9% service availability and average latency under 400 ms, exposes an API status page and benchmarks, and offers a dashboard for spend, latency and call volume with budget alerts. Enterprise-oriented features include centralized accounts for multiple teams, per-team budgets, encrypted transit and a stated policy that customer data is not used to train models. Integrations with coding agents, low-code automation platforms and app builders let teams plug the gateway into existing workflows rather than rebuilding them.

**Pricing & Plans:** Pay-as-you-go API credits with no monthly subscription, minimum spend or credit card required at signup. CometAPI advertises per-model rates below official vendor pricing, typically 20-40% cheaper, and test credits are included when you create an account.

- **One key for 500+ models:** Replace separate OpenAI, Anthropic and Google credentials with a single key and switch models by changing one line of code.
- **OpenAI-compatible endpoint:** Route text, reasoning, coding, image, audio and video workloads through one OpenAI-compatible base URL without rewriting your app.
- **Transparent pricing and savings:** Line-item pricing per model with discounts below official vendor rates, pay-as-you-go with no monthly subscription or minimum spend.
- **Usage analytics and cost control:** A real-time dashboard tracks spend, latency and call volume so you can set budget alerts and compare models side by side.
- **Prebuilt tool integrations:** Works with Claude Code, Codex, Cline, Dify, n8n, Zapier, Coze and other agent, automation and app-building tools.

**Strengths:** One credential and one endpoint for 500+ models from many providers; OpenAI-compatible format means existing code keeps working with minimal changes; Pay-as-you-go credits with no monthly fee and unused balance carried forward; Dashboard for spend, latency and call volume with budget alerts

**Limitations:** You depend on a third-party intermediary for uptime and latency on every routed model; Some catalog entries are marked coming soon, so not every listed model is instantly available; Pricing and availability can shift as upstream vendors change their own rates

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

## Manifest

Manifest is an open-source LLM gateway aimed at the reliability problem rather than the model problem. Instead of asking teams to standardise on one provider, it exposes a single OpenAI-compatible endpoint through which agents, coding harnesses and applications can reach OpenAI, Anthropic, Google, subscription plans, bring-your-own-key providers, custom endpoints and local servers such as Ollama, LM Studio or llama.cpp. Routing rules and model parameters are configured visually per route, so behaviour changes without touching application code.

Its signature feature is Autofix. The project cites Datadog data that roughly 5% of LLM API calls fail in production, many for avoidable reasons, and Manifest inspects each request before it reaches the provider to repair malformed payloads on the fly. Combined with automatic fallbacks when a provider degrades, full request and response body logging, and cost breakdowns per agent, key and provider, the gateway acts as a control plane for inference rather than a simple proxy.

The project is fully open source with a self-hosted Docker edition and a hosted cloud option for faster onboarding, supported by a community and an error catalog classifying common provider errors. The hosted tier's pricing lives on the site's pricing page, while the open-source gateway itself is free to run on your own infrastructure.

**Pricing & Plans:** The gateway is free and open source, with a hosted cloud version for easier onboarding and paid tiers for teams and platforms; exact plan pricing is published on Manifest's pricing page.

- **Single endpoint routing:** One OpenAI-compatible endpoint reaches every configured model, provider, subscription plan or local server.
- **Autofix request repair:** Broken or non-conforming LLM requests are repaired automatically before the error reaches your agent or app.
- **Fallbacks and reliability:** Automatic retry on another provider when one goes down keeps agents and workflows running.
- **Cost and observability:** Track every request, token and dollar broken down by agent, key and provider, with full request and response body logs.
- **Self-hosting and local models:** Run the router on your own infrastructure and decide exactly what goes to the cloud and what stays local.

**Strengths:** Open source and self-hostable, with no black box between your agents and providers; Autofix and automatic fallbacks tackle the real failure rate of production LLM calls; Cost and token observability by agent, key and provider makes spend accountable; Supports subscriptions, BYOK, custom providers and local models in one router

**Limitations:** Self-hosting requires Docker and some infrastructure ownership; Younger project than large commercial gateways, so some enterprise governance needs custom work

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

## Frequently Asked Questions

### How do CometAPI and Manifest compare in monthly traffic?

CometAPI has 602,966 monthly visits, while Manifest has 54,135. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

CometAPI has a month-over-month growth rate of +49.7%; Manifest has -23%.

### How does pricing compare?

CometAPI: Pay-as-you-go (credits). Pay-as-you-go API credits with no monthly subscription, minimum spend or credit card required at signup. CometAPI advertises per-model rates below official vendor pricing, typically 20-40% cheaper, and test credits are included when you create an account. Manifest: Free. The gateway is free and open source, with a hosted cloud version for easier onboarding and paid tiers for teams and platforms; exact plan pricing is published on Manifest's pricing page.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [Google AI Studio](https://openaitools.app/tool/google-ai-studio) | 112,620,020 | +2% | Freemium | Google's rapid prototyping IDE and developer API workbench for building multimodal applications with Gemini models. | [.md](https://openaitools.app/tool/google-ai-studio.md) |
| 2 | [OpenRouter](https://openaitools.app/tool/openrouter-ai) | 19,941,437 | -6.2% | Paid | One API key for hundreds of AI models from every major provider | [.md](https://openaitools.app/tool/openrouter-ai.md) |
| 3 | [Groq](https://openaitools.app/tool/groq) | 3,987,936 | +10% | Paid | Ultra-fast AI inference on the LPU and LPX platform | [.md](https://openaitools.app/tool/groq.md) |
| 4 | [fal.ai](https://openaitools.app/tool/fal-ai) | 3,093,684 | -3.7% | Paid, pay-as-you-go usage-based pricing | Excels at serverless generation of media models like images and video, but is less focused on general LLM routing. | [.md](https://openaitools.app/tool/fal-ai.md) |
| 5 | [Together AI](https://openaitools.app/tool/together-ai) | 1,645,930 | +64.9% | Freemium, Paid | Specializes in high-performance serverless inference for open-source models, but offers fewer proprietary commercial model options. | [.md](https://openaitools.app/tool/together-ai.md) |
| 6 | [OrcaRouter](https://openaitools.app/tool/orcarouter) | 975,300 | -5.2% | Freemium | One OpenAI-compatible gateway for adaptive LLM routing, guardrails, and spend control | [.md](https://openaitools.app/tool/orcarouter.md) |
| 7 | [Atlas Cloud](https://openaitools.app/tool/atlas-cloud) | 777,031 | -16.4% | Paid | Offers unified access to multimodal language and media models, but focuses more heavily on generation infrastructure. | [.md](https://openaitools.app/tool/atlas-cloud.md) |
| 8 | [LiteLLM](https://openaitools.app/tool/litellm) | 576,967 | +7.9% | Freemium, Contact for Pricing | One open-source AI gateway for 100+ LLM providers | [.md](https://openaitools.app/tool/litellm.md) |
| 9 | [ZenMux](https://openaitools.app/tool/zenmux) | 444,394 | +16.7% | Freemium, Paid | One unified API for 100+ AI models, with insurance when output disappoints | [.md](https://openaitools.app/tool/zenmux.md) |
| 10 | [EvoLink AI Model API](https://openaitools.app/tool/evolink-ai-model-api) | 312,573 | -27% | Free Trial, Paid, Contact for Pricing | One API for LLM, image, video, and audio models in production | [.md](https://openaitools.app/tool/evolink-ai-model-api.md) |

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Source: https://openaitools.app/compare/cometapi-vs-manifest

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