# Sendmux vs Skillry

Sendmux records 37 monthly visits with -98.3% month-over-month growth and Free pricing. Skillry records 535,817 monthly visits with +1,762.1% growth and Freemium pricing.

| Metric | [Sendmux](https://openaitools.app/tool/sendmux) | [Skillry](https://openaitools.app/tool/skillry) |
| :--- | :--- | :--- |
| Website URL | https://sendmux.ai | https://skillry.dev |
| Categories | AI Developer Tools, AI Workflow, AI Email Assistant | AI Code Assistant, AI Design Assistant, AI Website Builder, AI Presentation Generator |
| Pricing Model | Free | Freemium |
| Monthly Visits | 37 | 535,817 |
| MoM Growth Rate | -98.3% | +1,762.1% |
| Primary Market | United States | United States |
| Direct Visits | 12 | 242,881 |
| Review Score | 4.2 | 4.5 |
| Saved Count | 0 | 0 |
| Supported Platforms | Website | Website |

## Sendmux

Agents that need to handle email usually end up stitched together from two or three services: one platform for sending, another for receiving, and a pile of glue code to reconcile them. Sendmux collapses that into a single API surface. It covers outbound mail, agent mailboxes, routing controls, and delivery events, so an agent can send, receive, route, and react without juggling separate accounts and bills.

A key design decision is that inbox data is formatted for machine consumption. Gmail and Outlook typically return full HTML bodies that burn thousands of tokens before the agent gets to the actual content. Sendmux strips signatures and quoted history by default and exposes links, headers, and attachment metadata only when asked, so the model spends its budget on the message rather than the markup.

On the sending side, Sendmux is deliberately not a single-provider lock-in. A mailbox credential works as both a Bearer token for HTTP and a password for SMTP, and routing can be bound to specific providers, delivery groups, weights, and quota windows. Events arrive through signed webhooks, an SSE stream, or typed change polling, which means agents can react in real time rather than running polling loops. SDKs for TypeScript and Python, a CLI, framework integrations, and an MCP endpoint make it straightforward to wire the whole thing into an existing agent stack.

**Pricing & Plans:** Sendmux is listed as free, with two free mailboxes available to start and agent onboarding designed to be self-service. Pricing beyond the initial free mailboxes is not detailed on the landing page, so check the pricing page for current tiers.

- **Agent mailboxes:** Provision mailboxes on verified domains or a shared myagent.mx address, with clean JSON output that strips signatures and quotes.
- **Provider-flexible sending:** Send over HTTP or SMTP using the same mailbox credential as a Bearer token and SMTP password, with Idempotency-Key retries and attachment support.
- **Routing controls:** Bind keys to providers, delivery groups, weights, and quota windows so traffic stays inside the boundaries you set.
- **Real-time events:** Signed webhooks for delivery and receipt events, an SSE stream for live mailbox clients, and typed change polling for resync.
- **Developer tooling:** Official SDKs for TypeScript and Python, a CLI, LangChain and AI SDK integrations, and a hosted MCP endpoint with OAuth.

**Strengths:** One API for sending, receiving, routing, and events; Inbox payloads tuned for LLM token efficiency; Not locked to a single sending provider; Practical developer tooling: SDKs, CLI, MCP, framework integrations

**Limitations:** Newer platform, so the surrounding ecosystem and community material are still small; Using your own sending providers puts deliverability and domain reputation on you; Agent mailboxes still depend on correct DNS setup for verified domains

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

## Skillry

Skillry is a curated library of Agent Skills — reusable packages of instructions, templates and scripts that AI coding agents can install and run. The concept is straightforward: give an agent a well-designed workflow, and it can produce a complete, presentable artifact rather than a rough draft. Skillry focuses on deliverables you would actually show, spanning web pages and landing pages, slide decks, images such as OG graphics, and short videos.

The key differentiator is that Skillry designs the output first. Its team art-directs a finished piece — a page, a deck, a film — then writes the original instructions, templates and scripts that let your agent reproduce that style. Each Skill page displays a real result it made, so you can see the visual point of view before installing. Skills are maintained by the same team as agents and models evolve.

Installation is agent-first. You can browse the catalog on the web, connect via MCP so your agent can search and inspect Skills, or install from the CLI. Free Skills require only a sign-in, while Premium Skills come with a Pro subscription or a one-time lifetime purchase. Model, API and rendering costs are handled by your own environment, not by Skillry.

**Pricing & Plans:** Free Skills are available with a sign-in. Pro is $9.99/month (regularly $19.90) or $79/year (regularly $158), and a Founding Lifetime plan costs $169 one-time. All paid plans include Premium Skills, MCP/CLI/web install and ongoing updates; model and rendering costs are extra.

- **Original in-house Skills:** Every Skill is designed, written and tested by the Skillry team, with templates and scripts built from a finished piece of work.
- **Multiple output types:** Skills cover web pages, slide decks, images, video and reports, so your agent can produce a range of assets.
- **Broad agent support:** Install and run Skills inside Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI and more.
- **Preview before install:** Each Skill page shows a real result it generated, so you can judge the visual style before adding it.
- **Flexible installation:** Add Skills from the web, through an MCP connection or from your CLI, with browser-based authorization.

**Strengths:** Original Skills designed and maintained in-house; Covers websites, slides, images and video in one library; Works across Claude Code, Codex, Cursor and many other agents; Each Skill previews a real result before you install

**Limitations:** Full access to Premium Skills requires a paid plan; Model, API and rendering costs are separate from the subscription; The catalog is newest to market, so coverage keeps evolving

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

## Frequently Asked Questions

### How do Sendmux and Skillry compare in monthly traffic?

Sendmux has 37 monthly visits, while Skillry has 535,817. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Sendmux has a month-over-month growth rate of -98.3%; Skillry has +1,762.1%.

### How does pricing compare?

Sendmux: Free. Sendmux is listed as free, with two free mailboxes available to start and agent onboarding designed to be self-service. Pricing beyond the initial free mailboxes is not detailed on the landing page, so check the pricing page for current tiers. Skillry: Freemium. Free Skills are available with a sign-in. Pro is $9.99/month (regularly $19.90) or $79/year (regularly $158), and a Founding Lifetime plan costs $169 one-time. All paid plans include Premium Skills, MCP/CLI/web install and ongoing updates; model and rendering costs are extra.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [MotionSites](https://openaitools.app/tool/motionsites) | 1,088,363 | -8.7% | Freemium, Paid | Supplies landing page design inspiration and prompts, focusing more on visual website layouts than code-ready agent skills. | [.md](https://openaitools.app/tool/motionsites.md) |
| 2 | [Impeccable](https://openaitools.app/tool/impeccable) | 1,038,637 | +8.2% | Free | Installs directly as a design skill pack to enforce UI rules, whereas Skillry acts as a broader discovery library. | [.md](https://openaitools.app/tool/impeccable.md) |
| 3 | [Missive](https://openaitools.app/tool/missive) | 631,353 | +0.2% | Free Trial, Paid | Collaborative inbox and email management for teams | [.md](https://openaitools.app/tool/missive.md) |
| 4 | [SkillsMP — Agent Skills Marketplace](https://openaitools.app/tool/agent-skills-marketplace) | 470,744 | -3.7% | Free | Broader community catalog of open-source agent SKILL.md files, but less focused specifically on design system templates. | [.md](https://openaitools.app/tool/agent-skills-marketplace.md) |
| 5 | [Carly AI](https://openaitools.app/tool/carly-ai) | 340,001 | +1.5% | Freemium | Email an AI assistant and let it run your schedules, inbox and CRM | [.md](https://openaitools.app/tool/carly-ai.md) |
| 6 | [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) |
| 7 | [Pipedream](https://openaitools.app/tool/pipedream) | 312,216 | -14.3% | Freemium, Paid, Contact for Pricing | Managed auth and 10,000+ tools for the agents you're building | [.md](https://openaitools.app/tool/pipedream.md) |
| 8 | [Morph](https://openaitools.app/tool/morph-apply-ai-edits-to-files-fast) | 306,961 | +9.5% | Free Trial, Contact for Pricing | Fast Apply and agent-tuned inference for coding agents | [.md](https://openaitools.app/tool/morph-apply-ai-edits-to-files-fast.md) |
| 9 | [AGENTS.md](https://openaitools.app/tool/agents-md) | 245,457 | +5.7% | Free | Offers an open Markdown convention to guide AI coding assistants, but functions as a standard format rather than a curated library. | [.md](https://openaitools.app/tool/agents-md.md) |
| 10 | [Portkey](https://openaitools.app/tool/portkey-ai) | 195,650 | -9.4% | Freemium, Paid, Contact for Pricing | AI gateway, observability and guardrails for production LLM apps | [.md](https://openaitools.app/tool/portkey-ai.md) |

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Source: https://openaitools.app/compare/sendmux-vs-skillry

More Markdown: [Categories](https://openaitools.app/categories.md) · [Traffic rankings](https://openaitools.app/rankings.md) · [llms.txt](https://openaitools.app/llms.txt)