Rivet.dev records 21,359 monthly visits with -44.3% month-over-month growth and Freemium, Contact for Pricing pricing. Spark Mail records 435,229 monthly visits with -13.5% growth and Freemium, Free Trial pricing.
Run and scale durable AI agents on your own infrastructure
Smart, focused email with AI help — for individuals and teams
| Dimension / Metric | | |
|---|---|---|
| Official Domain | rivet.dev | sparkmailapp.com |
| Pricing Model | Freemium, Contact for Pricing | Freemium, Free Trial |
| Monthly Visits | 21.36K (21,359) | 435.23K (435,229) |
| MoM Traffic Delta | -16.97K (-44.3%) | -67.76K (-13.5%) |
| Primary Market & Share | 🇺🇸 United States (39.4%) | 🇺🇸 United States (31.3%) |
| Direct Visits / mo | 10.71K | 198.43K |
| User Rating | 4.5 | 4.3 |
| Supported Platforms | Website | Website |
Run and scale durable AI agents on your own infrastructure
Every Actor gets a SQLite database and a filesystem, so an agent's memory and progress survive restarts and idle periods without a separate database.
Run untrusted or AI-generated code on your own infrastructure with fine-grained control over network access, filesystem permissions, and resource limits.
A node failure reschedules its Actors elsewhere with state intact, and multi-step work replays after a crash — with no checkpointing harness to build yourself.
Address an Actor directly over HTTP or hold a live WebSocket, and use the React SDK to subscribe components to an Actor's state in real time.
Smart, focused email with AI help — for individuals and teams
Spark's Smart Inbox and Priority highlight messages from important people and bundle newsletters and notifications so the rest of your inbox stays quiet.
An AI Assistant lets you find, summarize, and take action on anything in your inbox, while an AI writing assistant drafts emails and Auto-Drafts pre-writes replies.
Translate incoming messages, get instant summaries of long threads, and quickly grasp the point without reading every line.
Share drafts, leave private comments, delegate ownership, and track progress on email threads with your colleagues.
Blazing-fast keyboard-driven email experience with powerful AI features, but operates on a much higher subscription price point.
Blazing-fast keyboard-driven email experience with powerful AI features, but operates on a much higher subscription price point.
Significantly stronger team collaboration features with shared inboxes and internal chat, but less focus on standalone consumer AI drafting.
Significantly stronger team collaboration features with shared inboxes and internal chat, but less focus on standalone consumer AI drafting.
Provides cross-platform support with integrated AI drafting, but lacks some of Spark's advanced shared team workspace features.
Provides cross-platform support with integrated AI drafting, but lacks some of Spark's advanced shared team workspace features.
Free / Open-sourceThe TypeScript framework for building, deploying, and observing AI agents
Offers deeper AI-driven inbox organization and automated bundles, but has a different interface and navigation structure than Spark.
Offers deeper AI-driven inbox organization and automated bundles, but has a different interface and navigation structure than Spark.
The low-cost cloud sandbox where AI agents actually live
The low-cost cloud sandbox where AI agents actually live
SpecialistOne AI assistant that works wherever you work
SpecialistOne AI assistant that works wherever you work
Self-hosted cloud development environments and AI coding agents for enterprise teams
Transforms traditional email threads into conversational chat interfaces, but requires adjusting to a non-standard inbox layout.
Transforms traditional email threads into conversational chat interfaces, but requires adjusting to a non-standard inbox layout.
Free / Open-sourceOpen-source and self-hostable AI email assistant focused on blocking cold emails and sorting, but lacks a full native mobile app client.
Free / Open-sourceOpen-source and self-hostable AI email assistant focused on blocking cold emails and sorting, but lacks a full native mobile app client.
Persistent Ubuntu cloud VMs built for AI agent factories
Agent-native cloud infrastructure that lets coding agents run the whole backend stack
