EngineeringBuilding a Multi-Tenant Observability Stack with GreptimeDB and Perses
How we track custom domain traffic, API interactions, and tenant health using an open-source OpenTelemetry pipeline.
Now Available in Early Access
Drop-in comments
without the bloat
A blazingly fast, privacy-first commenting engine powered by Rust and HTMX. Self-host it for free, or let us manage the multi-tenant infrastructure for you.
0 KBClient-side JS
< 50msAPI Response Time
100%Ad-Free & Private
100+
Concurrent Connections
0 KB
JavaScript Required
1-Click
Docker Deployment
100%
Theme Compatible
Framework agnostic. Works perfectly with your favorite static site generators.
Astro
Hugo
Next.js
WordPress
HTML5
Integration
Deploy to your site in 60 seconds
No heavy SDKs, no complex configuration.
1
Sign Up or Self-Host
Create an account on our managed cloud, or spin up the AGPLv3 open-source Docker container on your own server.
2
Drop in the Widget
Paste a single HTMX snippet onto your blog or website. It automatically adapts to your site's layout.
3
Customize Your Theme
Define a few CSS variables in your own stylesheet to map the comment colors seamlessly to your light and dark modes.
Features
Engineered for maximum performance
Built from the ground up for speed, privacy, and developer experience.
Blazingly Fast Rust API
Powered by Axum and SQLite, the backend responds in milliseconds with microscopic memory usage.
Zero-JS Frontend
Uses HTMX to swap HTML directly. No React, no Vue, no bloated tracking scripts weighing down your Lighthouse score.
Privacy First
The anti-Disqus. We do not track your users, serve ads, or sell data. Your community belongs to you.
Dynamic Theming
Uses CSS Custom Properties to inherit your siteโs typography and automatically switch between light and dark modes.
Admin Moderation
Includes a secure JWT-based admin dashboard to review, approve, and delete comments instantly.
Asynchronous Alerts
Powered by a Valkey queue, ensuring you receive instant email notifications without blocking the API thread.
Deep Dive
Inside the Engine
Explore the technical architecture powering the platform.
Framework Agnostic
Works anywhere you can paste an HTML div tag.
CSS Variables
Easily override colors and borders in your own stylesheet.
No Build Step
Does not require NPM, Webpack, or Vite to integrate.
Compare
Why choose our engine?
See how we stack up against traditional bloated commenting systems.
| Feature | Disqus / OthersAds & Tracking | Most PopularOur Managed Cloud$29 / month | Self-HostedFree |
|---|---|---|---|
| Client-side JS size | ~500 KB | 14 KB (HTMX) | 14 KB (HTMX) |
| Ad-free | |||
| Data ownership | |||
| Dynamic Dark Mode | |||
| Automated SSL | |||
| Server maintenance | Managed | Managed | You handle it |
| Learn More | Start Trial | View Repo |
Tech Stack
Powered by modern infrastructure
We built this utilizing the most efficient tools in the ecosystem.
Rust
Axum framework for blazing fast, memory-safe API routes.
SQLite
High-performance local database for comment storage.
HTMX
Zero-JS reactivity for seamless form submissions.
Astro
The perfect companion framework for static sites.
Caddy
Dynamic reverse proxy with On-Demand TLS.
Valkey
In-memory background job queues for email alerts.
Try It Live
Leave a comment below to see the engine in action. No sign-up required.
Recent Comments
Loading MarkReply engine...
Pricing
Choose Your Plan
Select the infrastructure tier that fits your needs. Cancel anytime. Prefer to self-host? The core engine is 100% free and open-source (AGPLv3) on GitHub.
MonthlyYearlySave 20%
Managed Pro
Perfect for single blogs and personal sites.
$9/month
Included in Plan
- 1 Custom Domain
- Automated SSL via Caddy
- Email Moderation Alerts
Most Popular
Agency SaaS
For agencies managing multiple client sites.
$29/month
Current Plan
- Up to 10 Custom Domains
- Webhook Integrations
- Custom Logo Uploads
- Priority Support
Enterprise
For large platforms needing unbounded scale.
$99/month
Upgrade to Enterprise
- Unlimited Custom Domains
- Webhook Integrations
- Custom Logo Uploads
- Dedicated Priority Support
Testimonials
Built for the modern web
Developers love removing heavy JavaScript from their static sites.
"I ripped out Disqus, dropped in this HTMX snippet, and my Astro blogโs Lighthouse score jumped back to 100."
Alex D.
Tech Blogger
"The dynamic CSS variables are genius. I mapped them to my dark mode toggle and it just worked instantly."
Sarah M.
Frontend Engineer
Creator
Built by infrastructure experts
Designed by engineers who care about performance, observability, and clean architecture.
Rajasekhar Gundala
Creator & Lead Architect
Senior Infrastructure & Web Platform Leader. Specializing in high-performance Rust, DevOps, and enterprise observability.
Roadmap
Development Pipeline
Follow along as we build out the Commercial Open-Source ecosystem.
Phase 1
Released
Core Engine (Live)
Rust Axum API, SQLite database, and HTMX frontend integration completed.
Phase 2
Released
Multi-Tenant SaaS (Live)
Native Rust control plane and Caddy dynamic routing implemented.
Phase 3
Released
Automated Billing & Queues
PayPal webhook listeners and Valkey email queues.
Phase 4
Released
Telemetry & Observability
OpenTelemetry integration for enterprise monitoring and Gฬถrฬถaฬถfฬถaฬถnฬถaฬถ Perses dashboards.
Engineering
Behind the Code
Technical deep dives into building high-performance Rust web services.
Engineering
SecurityZero-CVE: Building a Vulnerability-Free Rust Container
How we engineered a mathematically proven, secure Docker pipeline for MarkReply using Chainguard Wolfi, Trivy, and OWASP ZAP.
SystemsSelf-Hosting the MarkReply Core Engine
Deploy your own blazing-fast, SQLite-backed comment engine in minutes using Docker Compose.
FAQ
Frequently asked questions
Can't find what you're looking for? Reach out on GitHub.
How do I style the widget to match my site?
You just link our lightweight widget.css file, and then override variables like --comment-bg, --comment-text, and --comment-primary in your own stylesheet. It inherits your fonts automatically.
Does this require React or Vue?
No! The widget uses HTMX. You include one lightweight script tag, and the Rust backend serves pre-rendered, interactive HTML directly to the browser.
How does the custom domain routing work?
Our managed cloud uses Caddy reverse proxy with On-Demand TLS. Once you subscribe and point your DNS, our native Rust control plane automatically provisions your SSL certificate on your first visitor.
Can I self-host this?
Absolutely. The core engine is open-source. We provide the docker-compose files so you can deploy the Rust Axum API and SQLite database on your own VPS.
Support
Need help?
Whether you need help self-hosting or want to discuss Enterprise SaaS plans, reach out.
Email ussupport@markreply.com
IssuesOpen a GitHub Issue