Harper

🚀 Harper 5.2 is available now!

Get 5–8× faster warm reads, more predictable performance under heavy writes, and more throughput per node—with fewer systems to manage.

See what’s new: https://www.harper.fast/resources/harper-5-2-more-throughput-per-node-fewer-systems-around-it

Web personalization is a platform decision.

Architecture determines data freshness, latency, operational complexity, crawler visibility, and cost at scale.

We compared five common approaches and the tradeoffs behind each:

https://www.harper.fast/resources/five-architectures-for-web-personalization

Harper has been named a Sample Vendor in the Gartner® Hype Cycle™ for Digital Commerce, 2026 in the Front-End Cloud category.

We believe the next evolution of front-end cloud is about what the runtime can do.

Harper Named a Sample Vendor in the Gartner® Hype Cycle™ for Digital Commerce, 2026 Harper was named a 2026 Gartner Hype Cycle for Digital Commerce Sample Vendor, recognized in Front-End Cloud for its unified runtime combining data, application logic, messaging, and agent development together.

The citizen developer era is here, but the real question is whether AI-built apps can actually run inside the enterprise.

Stephen Goldberg explains why Harper’s unified runtime, built-in governance, and deployment flexibility make it the right foundation for what comes next.

https://www.harper.fast/resources/why-harper-is-the-definitive-platform-for-enterprise-citizen-developers

Blog | Why Harper is the Definitive Platform for Enterprise Citizen Developers Harper bridges the gap between business agility and IT security. Utilizing a unified runtime, Harper Fabric guarantees data sovereignty across any environment, from public clouds to air-gapped facilities. Empower users with secure, compliant AI application development and robust governance.

Everyone is building agents on Harper right now.

And the more people build, the more compelling the case gets.

Jeff Darnton’s latest article shows one strategy for turning coding agents into a real development system: dispatched agent teams that plan, build, QA, and review in parallel, with humans still owning direction.

The big unlock: Harper’s unified runtime gives agents fewer systems to understand and more room to build.

Tutorial | Production Quality at Vibe Code Velocity: Dispatched Agent Teams with Harper Harper enables production-grade agentic engineering by collapsing database, cache, runtime, and messaging into one process, reducing agent complexity and review burden. A multi-model dispatch workflow lets specialized agents plan, code, QA, and review in parallel while humans retain control over cri...

We’re going LIVE to build the ultimate river flow forecasting app. We're fusing live USGS stream gauges + snowpack data with an AI agent to predict flows based on historic records. We're also building a personal river log feature! 📝🤖

https://www.youtube.com/watch?v=RLT8w5udT04

New from Harper: rocksdb-js.
→ Full transaction support
→ Lazy range iteration
→ TypeScript API
→ Prebuilt binaries
→ Built-in transaction log

A ground-up open source RocksDB binding for Node.js. Huge thanks to Chris Barber.

Blog | New RocksDB Binding for Node.js rocksdb-js is a modern Node.js binding for RocksDB, offering full transaction support, lazy range queries, and a TypeScript API. Built for performance and scalability, it enables reliable write-heavy workloads, real-time replication, and high-concurrency applications in Harper 5.0 and beyond.

Harper 5.0 is open source.

Because we believe the future of software, especially with AI agents, is a unified runtime, not a fragmented stack.

Fewer layers. Smaller surface area. Better reasoning.

That’s how AI goes from prototype to production.

Full story ↓
https://www.harper.fast/resources/open-sourcing-harper

Blog | Open Sourcing Harper Harper is now open source, with its core platform released under Apache 2.0 and enterprise features source-available. This shift builds trust, enables community contributions, and positions Harper as a unified, transparent platform for developers and AI-driven applications.

Harper 5.0 is live.

Our core runtime is now fully open source (Apache 2.0), with Harper Pro source-available under ELv2. Now with RocksDB + LMDB support.

One platform for database, cache, messaging, and app logic—built for performance and scale.

Read more:

Harper Launches 5.0: Fully Open-Source Runtime for Building and Deploying Cost-Efficient Agents | HackerNoon Harper 5.0 launches with an open-source core, RocksDB support, and a unified runtime for AI agents—cutting latency and simplifying modern app development.

🚀 New podcast episode with Daniel Roe, lead of the Nuxt framework.

We discuss Nuxt 3, 4, the upcoming Nuxt 5, open-source leadership, and what teams should know before upgrading their apps.

If you're building with Vue or Nuxt, this is a must-watch.

🎧 Watch now https://www.harper.fast/resources/maintaining-momentum-versioning-stability-the-road-to-nuxt-5-with-daniel-roe

Podcast | Maintaining Momentum: Versioning, Stability & the Road to Nuxt 5 with Daniel Roe In this podcast episode, Daniel Roe, lead of the Nuxt framework, shares insights on Nuxt 3, 4, and the upcoming Nuxt 5 release. We discuss open-source development, upgrading Nuxt apps, Vue-powered full-stack web apps, version maintenance, and the future of modern web development.