HyperWrite, from OthersideAI, started as an AI writing assistant and grew into something broader: it still suggests and drafts text as you type, but it now also ships a Personal Assistant that can use your browser to complete tasks for you (HyperWrite, retrieved 2026). That makes it a useful comparison for Gravity, because both touch the idea of an AI doing work on your behalf. They get there in very different ways.

HyperWrite is one company's assistant, sold on a subscription. Gravity is a marketplace where many experts publish agents and you run the one that fits, paying per run. One is a companion that helps you write and clicks around the web for you; the other is a catalogue of finished agents that each do a defined job. Below is the honest breakdown of where each wins.

What HyperWrite is, and where it actually shines

HyperWrite's roots are in writing, and that is still its strongest surface. The browser extension offers suggestions and autocompletion as you type, it can draft and rewrite, and it includes real-time research that pulls from a large body of sources (HyperWrite, retrieved 2026). For people who write a lot, an assistant that lives inside the text box is a daily, low-friction benefit.

The Personal Assistant agent

On top of writing, HyperWrite added a Personal Assistant: an AI agent that can actively use your browser to complete tasks online, automating repetitive web workflows (HyperWrite, retrieved 2026). It is a general-purpose assistant, one tool meant to help with many things, which is convenient and, like most generalists, broad rather than deep on any single task.

Where HyperWrite is excellent

HyperWrite is at its best for someone whose core need is writing and who wants light web automation alongside it, all in one subscription. The drafting and research features are mature, and having a single companion across your writing and browsing is genuinely convenient. For where general assistants sit in the landscape, see our best personal AI agents roundup, and for a writing-specific use case, AI agent for LinkedIn content.

What Gravity does differently

Gravity is not a writing tool and not a single assistant. It is a marketplace. You describe an outcome in plain language, and Gravity matches you with an expert-built agent that runs the task in about 60 seconds. Instead of one company's generalist, you reach a catalogue of specialists, each built and tested by an expert for a specific job. You pay per use, where one dollar buys 1,000 credits, with no subscription. See how Gravity works.

The difference in shape matters. A single-vendor assistant is as good as that one vendor across everything it tries. A marketplace lets the best builder for each task be the one who made the agent you run, so depth can vary by agent rather than being capped by a single roadmap.

The three-sided marketplace

Gravity has three sides. Users run agents and pay per run. Builders publish agents and earn 20% of every run as pure profit. Creators earn 10% on runs from people they refer. A single-vendor assistant captures all the value itself; a marketplace shares it with the experts who build, which is what pulls in specialized depth over time. For the builder economics, see how to monetize AI agents.

Side-by-side comparison

Here is the honest mapping. Where I am unsure of a current HyperWrite price, I flag it rather than state it as fact.

DimensionHyperWriteGravity
CategoryAI writing assistant plus browser agentMarketplace of task agents
Vendor modelSingle vendor (OthersideAI)Many expert builders
Core strengthWriting, suggestions, researchSpecialized, finished outcomes
Pricing modelFree plan; premium around $20/mo Pay per use, $1 = 1,000 credits, no subscription
Agent typeOne general personal assistantMany specialized agents
Who builds the agentOthersideAIVetted expert builders
SetupInstall extension, subscribeDescribe outcome, run in about 60 seconds
Earning modelSingle vendor keeps the valueBuilders earn 20%, creators 10%
Best fitHeavy writers wanting light web helpOperators wanting specialized tasks done

HyperWrite clearly wins for writing and for the convenience of one tool. Gravity wins for breadth of specialized agents and pay-per-use. Several rows are buyer-dependent, so weight them by whether your day is mostly writing or mostly running defined tasks.

Assistant vs marketplace

The deepest difference is structure: one assistant versus a catalogue. HyperWrite is a single product with a single roadmap. That gives a tight, consistent experience, and it caps depth at whatever one company can build across writing and general assistance. A marketplace spreads the building across many experts, so the agent you run for a niche task can be made by someone who specializes in exactly that, rather than by a generalist stretching to cover it.

This is a different cut on the build-versus-buy question I lay out in build vs buy AI agent. With HyperWrite you buy one vendor's whole product. With Gravity you buy individual finished agents, run only the ones you need, and benefit when a specialist, not a generalist, built the one you picked.

Pricing: subscription vs per run

HyperWrite uses a subscription: a free plan plus paid tiers, with a premium plan around twenty dollars per month and a discount for paying annually, alongside occasional promotions (HyperWrite, retrieved 2026). That fits a daily writing tool well, where the flat fee earns its keep through constant use. Confirm the current numbers on HyperWrite's pricing page.

Gravity prices per use: one dollar buys 1,000 credits, spent only on runs you trigger, with no monthly fee. That fits specialized or occasional tasks, where a writing subscription would sit idle on the days you are not writing. The right model depends on whether your AI need is constant and writing-shaped or intermittent and task-shaped. For the full reasoning, see AI agent pricing explained.

When HyperWrite is the right choice

Three signals say HyperWrite. First, you write a lot and want suggestions and drafting woven into your daily typing. Second, you want a general browser assistant for light web tasks and value having it in the same tool. Third, a flat subscription suits steady, daily use. If those are true, HyperWrite gives you a polished writing companion that a task marketplace is not trying to be.

When Gravity is the right choice

Three opposite signals say Gravity. First, your need is a specialized, defined task done end to end, not help with writing. Second, you would rather run an expert-built agent for that job than a generalist that covers it shallowly. Third, you want to pay per run, not subscribe to a tool you use only sometimes.

The marketplace bet is that specialized, expert-built agents outperform a single generalist on the tasks that matter, and that paying per run beats paying for a seat. For why I made that bet, see about Gravity, and for how Gravity compares to the big general assistants, our Gravity vs ChatGPT breakdown.

Using both together

These tools fit different moments in a workday, so using both is reasonable. Keep HyperWrite for everyday writing and quick browser help, and run a Gravity agent when you have a specialized, recurring outcome you would rather hand to an expert-built tool than draft yourself. A writing companion and a marketplace of task agents are not competing for the same minute of your day.

Frequently asked questions

What is HyperWrite?

HyperWrite, from OthersideAI, is an AI writing assistant that suggests and drafts text as you work, plus a Personal Assistant agent that can use your browser to complete tasks online. It started in writing and grew an agent layer, so it spans both helping you write and acting on the web on your behalf.

What is the main difference between HyperWrite and Gravity?

HyperWrite is a single-vendor assistant: one company's writing tool and browser agent, on a subscription. Gravity is a marketplace where many expert builders publish agents and you run the one that fits, paying per run. HyperWrite is an assistant that helps you; Gravity is a catalogue of finished agents that do a defined task.

How much does HyperWrite cost?

HyperWrite has a free plan and paid tiers, with a premium plan around twenty dollars per month and a discount for paying annually. Promotional offers appear from time to time. Confirm the current plans on hyperwriteai.com/pricing. Gravity is in pre-launch waitlist in 2026 and prices per use, where one dollar buys 1,000 credits.

Does HyperWrite have an AI agent?

Yes. HyperWrite's Personal Assistant is an AI agent that can actively use your browser to complete tasks, alongside its writing features and real-time research. It is a general personal assistant built by one company. Gravity, by contrast, offers many specialized agents built and tested by different experts for specific outcomes.

When should I choose HyperWrite over Gravity?

Choose HyperWrite when your core need is writing, with suggestions and drafting woven into your daily typing, plus a general browser assistant for light web tasks, on a flat subscription. Choose Gravity when you want a specialized, expert-built agent to run a defined task end to end, paid per run, rather than a general writing companion.

Can HyperWrite and Gravity be used together?

Yes. You can use HyperWrite for everyday writing and quick browser help while running a Gravity agent for a specialized, recurring outcome you would rather hand to an expert-built tool. A writing companion and a marketplace of task agents serve different moments in a workday and coexist comfortably.

Three takeaways before you close this tab

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