How do their growth rates compare?

Open WebUI has a month-over-month growth rate of -2.8%; Sendmux has -98.3%.

How does pricing compare?

Open WebUI: Freemium. The core platform is free and open source, installable via pip or Docker with no account required. An enterprise tier with support, compliance and deployment assistance is quoted on contact. 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.

What are alternatives to Open WebUI and Sendmux?

Other tools in related categories include Ollama, n8n, Hermes-Agent, Clawdbot (OpenClaw), Dify.

Head-to-Head Benchmark

Open WebUI vs Sendmux

Open WebUI records 804,534 monthly visits with -2.8% month-over-month growth and Freemium pricing. Sendmux records 37 monthly visits with -98.3% growth and Free pricing.

Open WebUIFreemiumTraffic Leader

Self-hosted AI workspace for local and cloud models

Monthly Visits

804.53K

MoM Velocity

-2.8%

Top Market

🇺🇸 United States

View Open WebUI Analysis

openwebui.com

SendmuxFree

Give every AI agent a real inbox and one API to use it

Monthly Visits

37

MoM Velocity

-98.3%

Top Market

🇺🇸 United States

View Sendmux Analysis sendmux.ai

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	Open WebUI	Sendmux
Official Domain	openwebui.com	sendmux.ai
Pricing Model	Freemium	Free
Monthly Visits	804.53K (804,534)	37 (37)
MoM Traffic Delta

Primary Market & Share	🇺🇸 United States (24.5%)	🇺🇸 United States (100%)

Direct Visits / mo	299.84K	12

User Rating	4.4	4.2

Supported Platforms	Website	Website

Open WebUI

Self-hosted AI workspace for local and cloud models

Any Model, Any Endpoint

Connect local runtimes like Ollama alongside OpenAI-compatible and Anthropic APIs, and switch between them inside one interface.

Retrieval and Search Built In

RAG over your own documents, web search and citation-aware answers come standard, so responses are grounded in real sources.

Python Tools, Functions and Pipelines

Extend the platform with Python code to add custom tooling, preprocessing, and multi-step pipelines, then share them with others.

Enterprise Controls

SSO, RBAC, audit logs, data residency, and on-premises, hybrid or air-gapped deployment for organisations with strict requirements.

Strengths & Pros

+Free and open source with no account needed to install
+Works with local and cloud models through a single interface
+Strong privacy posture: your data and models stay on your infrastructure
+Extensive enterprise features including SSO, RBAC and audit logs
+Large, active community hub of shared prompts, tools and models

Frequently Asked Questions: Open WebUI vs Sendmux

Open WebUI has 804,534 monthly visits, while Sendmux has 37. Traffic estimates describe audience size, not product quality.

More Head-to-Head Matchups

Hermes-Agent vs Open WebUI

4.44M visits/mo

Hermes-Agent vs Sendmux

3.64M visits/mo

Best Alternatives to Open WebUI & Sendmux (12)

Limitations

–Self-hosting requires you to handle servers, updates and backups
–Some enterprise capabilities and support sit behind a paid, quote-based tier
–Feature depth means a learning curve for non-technical administrators
–Local model performance depends heavily on your own hardware

Sendmux

Give every AI agent a real inbox and one API to use it

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.

Strengths & Pros

+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

01

Ollama

9.4M/mo

Free / Open-sourceFunctions primarily as a lightweight CLI runtime for local models rather than a full-featured chat interface.

Large Language Models (LLMs)Free, Freemium, Paid+4.3%

Ollama command line running a local open-weight language model

#1

02

n8n AI workflow automation platform homepage with visual workflow builder

n8n

4.5M/mo

SpecialistOpen-source workflow automation built for AI agents and technical teams

AI WorkflowFreemium35% direct

#2

03

Hermes-Agent

3.6M/mo

SpecialistA free, open-source personal AI agent that learns your projects and works across every messaging app.

AI AgentFreemium29% direct

Hermes-Agent desktop app showing a conversation with scheduled automations and memory

#3

04

OpenClaw open-source personal AI assistant homepage

Clawdbot (OpenClaw)

1.9M/mo

SpecialistOpen-source personal AI assistant that runs on your own machine and works from chat apps

AI AssistantPaid, Free31% direct

OpenClaw assistant operating inside a chat app conversation

05

Dify

819.7K/mo

SpecialistSpecializes in visual workflow building and RAG pipelines rather than serving purely as a chat interface.

AI App BuilderFreemium57% direct

Dify Workflow Studio canvas with retrieval, branching, and model nodes connected in a flow

06

LobeHub

654.5K/mo

Free / Open-sourceFocuses on collaborative team AI workspaces and plugins, but shares similar open-source architectural goals.

AI AgentFreemium30% direct

07

Missive

631.4K/mo

Collaborative inbox and email management for teams

AI Writing AssistantsFree Trial, Paid76% direct

Missive shared inbox showing internal comments, assigned tasks, and team coordination on an email

08

AnythingLLM

512.3K/mo

SpecialistFocuses heavily on privacy-first document chat and local RAG pipelines, but offers fewer general-purpose chat UI features.

Large Language Models (LLMs)Freemium+12.9%

Screenshot of AnythingLLM's Meeting Assistant showing a local transcript with generated summaries and action items

09

LibreChat

346.9K/mo

Free / Open-sourceOffers robust multi-provider support and advanced user permission management, but has a slightly different configuration setup.

AI ChatbotFree37% direct

LibreChat chat workspace with model selector, agents sidebar and artifact panel

10

Carly AI

340K/mo

Email an AI assistant and let it run your schedules, inbox and CRM

AI AgentFreemium+1.5%

11

Merge

313.2K/mo

The universal context engine connecting agents to data, tools, and models

AI APIFreemium, Contact for Pricing+1.7%

Screenshot of the Merge platform showing unified API, agent handler, and gateway products

12

Pipedream

312.2K/mo

Managed auth and 10,000+ tools for the agents you're building

AI APIFreemium, Paid, Contact for Pricing58% direct

Visit

Ollama

9.4M/mo+4.3%

Open Source

Free / Open-sourceFunctions primarily as a lightweight CLI runtime for local models rather than a full-featured chat interface.

Large Language Models (LLMs)43% direct

Free, Freemium, Paid

Visit

n8n

4.5M/mo

Open Source

SpecialistOpen-source workflow automation built for AI agents and technical teams

AI Workflow35% direct

Freemium

Visit

Hermes-Agent

3.6M/mo

Open Source

SpecialistA free, open-source personal AI agent that learns your projects and works across every messaging app.

AI Agent29% direct

Freemium

Visit

Clawdbot (OpenClaw)

1.9M/mo

Open Source

SpecialistOpen-source personal AI assistant that runs on your own machine and works from chat apps

AI Assistant31% direct

Paid, Free

Visit

Dify

819.7K/mo

Open Source

SpecialistSpecializes in visual workflow building and RAG pipelines rather than serving purely as a chat interface.

AI App Builder57% direct

Freemium

Visit

LobeHub

654.5K/mo

Open Source

Free / Open-sourceFocuses on collaborative team AI workspaces and plugins, but shares similar open-source architectural goals.

AI Agent30% direct

Freemium

Visit

Missive

631.4K/mo

Collaborative inbox and email management for teams

AI Writing Assistants76% direct

Free Trial, Paid

Visit

AnythingLLM

512.3K/mo+12.9%

Open Source

SpecialistFocuses heavily on privacy-first document chat and local RAG pipelines, but offers fewer general-purpose chat UI features.

Large Language Models (LLMs)39% direct

Freemium

Visit

LibreChat

346.9K/mo

Open Source

Free / Open-sourceOffers robust multi-provider support and advanced user permission management, but has a slightly different configuration setup.

AI Chatbot37% direct

Free

Visit

Carly AI

340K/mo+1.5%

Email an AI assistant and let it run your schedules, inbox and CRM

AI Agent13% direct

Freemium

Visit

Merge

313.2K/mo+1.7%

The universal context engine connecting agents to data, tools, and models

AI API31% direct

Freemium, Contact for Pricing

Visit

Pipedream

312.2K/mo

Managed auth and 10,000+ tools for the agents you're building

AI API58% direct

Freemium, Paid, Contact for Pricing

Open WebUI vs Sendmux

Side-by-Side Traffic & Specification Matrix

Open WebUI

Strengths & Pros

Frequently Asked Questions: Open WebUI vs Sendmux

How do Open WebUI and Sendmux compare in monthly traffic?

How do their growth rates compare?

How does pricing compare?

What are alternatives to Open WebUI and Sendmux?

More Head-to-Head Matchups

Best Alternatives to Open WebUI & Sendmux (12)

Limitations

Sendmux

Strengths & Pros

Limitations