Harpd Answers
Direct answers, sourced from live data
Each answer leads with a concise, quotable response and links to the live Harpd Rank data behind it. Built for people and for AI answer engines (Google AI Overviews, ChatGPT, Perplexity, Gemini).
Quick answer
What are Harpd Answers?
Harpd Answers are direct, sourced answers to the questions people and AI answer engines ask about AI product rankings, Rank Points and agent commerce. Each answer leads with a concise, quotable response and links to the live Harpd Rank data behind it.
- Answers
- 100 published
- Harpd data figures
- 36 with full provenance
- Built for
- People + AI engines
Data source: Harpd Answers
Why it matters
Answer engines (Google AI Overviews, ChatGPT, Perplexity, Gemini) quote pages that state a direct answer up front and link to live evidence. Harpd Answers is built for that: every page is structured so a model can lift a clean, sourced sentence instead of guessing.
Limitations
- Best-tool answers reflect the live Harpd Rank board, which is promotional placement — not an editorial quality verdict. Rank Points are spent, not earned by merit.
- Concept answers explain Harpd’s own mechanisms; they describe how Rank Points work, not how any third-party product performs.
- Figures on individual answer pages follow the data date shown there; they can trail the latest board update.
Data source: Harpd Answers
Live rankings
What are the best tools right now?
Ranked on the live Harpd Rank board — not a stale listicle.
What are the best AI agents right now?AI agents moved from demo to daily driver in 2026, but which platforms teams actually back is a moving target. This answer ranks AI agent products on the live Harpd Rank board so the list reflects current maker activity rather than a one-time editorial pick.What are the best developer tools right now?The wrong API, testing or infrastructure choice costs weeks. This answer ranks developer products on the live Harpd Rank board — APIs, SDKs, dev infrastructure and engineering productivity tools — using live leaderboard data instead of a stale top-10 listicle.What are the best SEO tools right now?Search is splitting into classic Google results and AI answer engines, and the tooling splits with it. This answer ranks SEO products on the live Harpd Rank board — technical crawlers, content optimizers and answer-engine visibility tools — by live leaderboard data.What are the best AI coding tools right now?AI coding tools write, review or refactor code rather than host it. This answer ranks the AI-first developer products on the live Harpd Rank board in leaderboard order, so you can see which coding assistants makers are actively backing this month.What are the best productivity tools right now?Most productivity apps add work instead of removing it. This answer ranks productivity products on the live Harpd Rank board — task managers, automation and focused utilities — so you can compare what teams actually list and promote today.
Explained
How Harpd Rank and agent commerce work
Plain-language explainers with how-it-works and how-it-compares sections.
What is Harpd?Harpd is an independent product discovery and ranking intelligence platform for AI tools and software, publishing rankings, comparisons, research, datasets, benchmarks and evidence.What is Harpd Rank?Harpd Rank is a live AI product discovery and ranking platform where makers submit products for free and compete for leaderboard position with Rank Points — promotional placement bought with Credits, disclosed openly rather than dressed up as editorial quality.What are Rank Points on Harpd Rank?Rank Points are permanent promotional placement on the Harpd Rank leaderboard. Makers buy them with Credits; the more a product holds, the higher it sits. They are explicitly promotional — not a quality score — and Harpd discloses this on every ranked page.How do AI agents pay each other?AI agents pay each other with machine-to-machine payment protocols. The common open standard is x402: an agent sends USDC (a dollar-pegged token) over a normal HTTP 402 response — no account, invoice or human in the loop. Harpd runs an Agent Market where external agents pay USDC to call its ranking and dataset endpoints.What is agent commerce?Agent commerce is AI agents transacting autonomously — paying for API calls, subscribing to tools, or buying data — without a human approving each step. It extends ecommerce from "a person clicks buy" to "a software agent settles a micropayment" so workflows run end to end. Harpd ships open SDKs that let agents set spend limits and produce an audit trail for every payment.How much does it cost to list on Harpd Rank?Listing on Harpd Rank is free. Submitting a product and getting it approved costs nothing, and entering Rank with your first Credit (1 Credit) makes it eligible to compete. Rank Points — which move a product up the board — are bought with Credits, so any cost is optional promotional spend you control.What is product intelligence?Product intelligence is structured, sourced knowledge about software products — who they are, what category they belong to, how they move in a market, and what evidence supports each claim. Harpd publishes it as open data.What is a Rank Credit on Harpd Rank?A Rank Credit is the unit makers spend to add permanent Rank Points to a Harpd Rank listing. One completed Credit spend creates one Rank Point, and the first Credit also makes an approved product eligible to enter Rank.What is a category board on Harpd Rank?A category board is the leaderboard for one product category, with its own Overall, Monthly and Weekly views. Products enter free after approval; Rank Points set positions for RP holders, while 0-RP products follow in approval order. Visits feed Trending, not Rank position.What is a verified maker on Harpd Rank?A verified maker is a listing whose owner has proven control of the product — typically by verifying a domain or account. Verification proves ownership; it is not a quality judgment and does not affect board position.What is the Harpd evidence register?The evidence register is the public list of every claim Harpd publishes, each resolved to its source dataset, methodology, data date and confidence. It is what makes a Harpd number auditable rather than merely stated.What is a data snapshot in Harpd research?A snapshot is a frozen copy of the Harpd Rank board at the end of a period. Research reports are computed from snapshots rather than the live board, so a quoted figure stays reproducible after the board moves.What does CC BY 4.0 mean for Harpd data?CC BY 4.0 lets you use Harpd data commercially, redistribute it and build on it, provided you attribute Harpd and keep the data date. It is the licence on every public Harpd dataset.What is llms.txt and does Harpd publish one?llms.txt is a plain-text file that tells AI systems what a site contains and where its machine-readable resources are. Harpd publishes /llms.txt and /llms-full.txt as its AI entry point.What is the Harpd entity graph?The Harpd entity graph is the machine-readable map of Harpd's entities — the platform, its products, categories, datasets and research — each with a stable identifier and typed relationships between them.What is the Harpd methodology and why does it matter?The Harpd methodology is the written rule set behind every published number: how products enter the board, how Rank Points are created and ordered, what is measured and what is explicitly not. It is public and machine-readable.How do I list my product on Harpd Rank?Submit the product at /rank/manage/, wait for moderation, and it enters the public board at 0 Rank Points. Listing is free; only promotional Rank Points cost Credits.How does Harpd Rank order products?Board position is determined by Rank Points — permanent promotional placement bought with Credits. Products with 0 Rank Points appear after all RP holders in order of entry, earliest approval first. Rank Points are not a quality score, and Harpd says so on every board.How does Harpd Trending work?Trending is Harpd's entirely organic view: it uses recent unique profile activity, clicks and saves in a rolling seven-day window, and uses no Credits and no Rank Points at all.How are Harpd product categories created?Categories come from a fixed published taxonomy. A board exists before it holds products, and a new category is added when a genuine cluster of products does not fit any existing board.How is Harpd research produced?Each research report is computed from a closed monthly snapshot of the Harpd Rank board, then published with its dataset, method, coverage and limitations — so every figure can be recomputed.How does the Harpd API work?The Harpd public API is read-only, keyless and CC BY 4.0: datasets are served as JSON and CSV from /data/*, with a documented reference at /developers/api/.How do I embed Harpd data on my site?Two options: an interactive widget generated at /developers/embed/, or a static attribution badge from /developers/attribution/. Both link back to the canonical Harpd source, as CC BY 4.0 requires.How do I cite Harpd data?Attribute as "Harpd", cite the specific dataset or report rather than the homepage, include an access date, and keep the data date with the figure. Copy-ready formats are published for every dataset.How do I report an error in Harpd data?Contact Harpd with the claim id or dataset URL and the figure you believe is wrong. Corrections are made against the dataset and recorded, not patched in the article that quoted it.What are the limitations of Harpd data?Harpd measures discovery activity on its own surface — not revenue, satisfaction or market size. Category share means share of Harpd Rank participation, prices are list prices, and every figure carries a data date.Is Harpd data free to use?Yes. Every public Harpd dataset is free to read and free to reuse under CC BY 4.0. There is no key, no signup and no paid tier for public data — attribution is the only requirement.How often is Harpd data updated?Live Rank positions update as Rank Points change and new products are approved. Visit activity feeds Trending, not Rank order. Each dataset carries its own data date, which moves only when a record actually changes — never because the site was rebuilt.What formats does Harpd data come in?JSON and CSV for every public dataset, JSON-LD for structured data on pages, Markdown READMEs for data dictionaries, and SVG for attribution badges. All under CC BY 4.0.What is the Harpd market index?The Harpd market index is the published breakdown of Harpd Rank participation by category: product counts, share of listings and the leading product per category, with an explicit disclosure that this is not global market share.What is a Harpd benchmark?A Harpd benchmark is a repeatable measurement run against a stated workload with a published method and result set. Modeled estimates are labeled as modeled and must not be cited as measured output.What is cost per successful task?Cost per successful task is what a workload actually costs divided by the tasks it completes successfully — a truer measure than price per token, because a cheaper model that fails more often can cost more overall.What is the Harpd Discovery Index?The Harpd Discovery Index is a non-sponsored coverage dataset: products observed and qualified from public sources, independent of whether they hold any Rank Points or appear on a paid board.What is a Harpd comparison page?A Harpd comparison page compares two specific products side by side, using their entity data and rank position. It is generated only when both products exist with enough data — never as an empty doorway page.What is a Harpd alternatives page?A Harpd alternatives page lists deterministic alternatives to one product: same category, compatible product type, publicly listed and with enough data. Every alternative carries a stated reason.What is Harpd Open Data?Harpd Open Data is the public dataset layer: rankings, categories, the market index, model pricing, benchmarks, research and the Discovery Index, published as JSON and CSV under CC BY 4.0 with a written method for each.How do I claim my product listing on Harpd Rank?Claim the listing at /rank/manage/ by proving control of the product. Once verified you can edit the profile. Verification proves ownership — it does not affect rank position.What is the Harpd claim registry?The claim registry is the machine-readable list of every factual claim Harpd publishes, with its entity, value, source, dataset, evidence, methodology, data date, confidence and status.What is a Harpd citation and how do I get one?A Harpd citation is a pre-generated reference for a specific Harpd object — a dataset, product, category, research report, rank board or methodology page — in plain text, Markdown, HTML, JSON and BibTeX.What is Harpd Rank history?Rank history is the archive of closed monthly and weekly periods: each period is a frozen board state, so a product's position at a past date can be looked up rather than guessed.What is the Harpd model pricing dataset?It is a registry of public AI model list prices — input, output and cached input per million tokens — with each record carrying its provider source URL and a verification date.What is a product entity on Harpd?A product entity is the canonical record of one product on Harpd: a stable id, name, slug, description, category, product type, capabilities, website, verification status and rank data — reused by every page type.What is Harpd agent.json?agent.json is a machine-readable discovery file telling AI agents what Harpd offers, which endpoints are public, and how to call them — published at /agent.json and /.well-known/agent.json.Why does Harpd disclose Rank Points as promotional placement?Because they are bought with Credits. Labelling them as promotional is what keeps the board honest: a reader can separate paid visibility from earned attention, and no one mistakes a payment for an endorsement.What makes Harpd data citable?Five properties: a deterministic source, a published method, a fixed data date, an open licence and a pre-generated citation. Remove any one and a figure becomes an assertion.How does Harpd handle bot traffic in its visit data?Visit signals — impressions, outbound clicks and saves — are deduplicated per visitor and filtered for automated traffic, because a visit signal that can be bought or scripted is not a signal at all.What is the Harpd Overall board?The Overall board is the all-time Harpd Rank leaderboard: every approved product in a category. Rank Points set the order for RP holders; products without RP follow in approval order. It never resets.What is the Harpd Monthly board?The Monthly board is the Harpd Rank leaderboard scoped to the current UTC calendar month. When the month closes it is frozen into an archive, so a past month can be looked up rather than remembered.What is the Harpd Weekly board?The Weekly board scopes the leaderboard to the current UTC week. It moves faster than the Monthly board and is archived on close, which makes it the tightest view of near-term change on Harpd.What is a research family on Harpd?A research family is one recurring question tracked over time — for example how a category's participation changes month to month. Each family publishes a report per closed month that has enough data.What is the Harpd SEO page API?It is a per-URL JSON payload at /api/seo/page/{path} that exposes the same facts the HTML page renders — title, summary, entities, claims, datasets, evidence, methodology, citations, update date and licence.What is data parity on Harpd?Data parity means the same fact is identical in the HTML page, the machine-readable API payload and the underlying dataset. Harpd enforces it with an automated test rather than trusting the three to stay aligned.What is a Harpd claim id?A claim id is the stable identifier for one factual claim Harpd publishes. It appears in the claim registry, in dataset records and in deep links, so a claim can be referenced unambiguously years later.What is the Harpd citation registry?The citation registry records every Harpd citation with its claim, publisher, source type, canonical URL, verification status and staleness — published at /data/citations.json and rendered at /citations/.What is Harpd's OpenAPI description?Harpd publishes an OpenAPI document at /openapi.json describing its public endpoints, so a tool or agent can discover and call the API without reading documentation prose.What is a Harpd product profile?A product profile is the canonical page for one product: its definition, category, rank status, Rank Points, description, related products, alternatives, comparisons, rank history, data source, methodology, evidence and citation.What is a Harpd best-of page?A best-of page answers "what are the best X" from the live Harpd Rank board for one or more categories. It is generated only when those categories hold enough listings to be meaningful.What is a Harpd answer page?An answer page leads with a direct, quotable answer to one question, then supplies the data, provenance and citation behind it. It exists so an AI answer engine can quote Harpd without guessing.What is the Harpd category taxonomy?It is the fixed, published list of product categories Harpd uses — with stable slugs — that the boards, datasets, shares and programmatic pages are all built from.
Harpd data
How many, how much, how concentrated?
One page per computed figure. Each is rendered from its own citeable-fact record, so it carries the dataset, the evidence URL, the methodology and the data date it was calculated from — checkable, not asserted.
How many SEO products are listed on Harpd Rank?SEO products on Harpd Rank span technical crawlers, content optimizers and answer-engine visibility tools, reflecting how search itself split between classic results and AI answers.How many Agents products are listed on Harpd Rank?Agent products — orchestration frameworks, autonomous workflow tools and agent platforms — are the fastest-moving category on Harpd Rank, because the underlying capability changes month to month.How many AI Media products are listed on Harpd Rank?AI media covers image, audio and video generation and editing products. It is one of the categories where a listing competes directly against well-funded incumbents, so board position matters commercially.How many Marketing products are listed on Harpd Rank?Marketing products on Harpd Rank include campaign tooling, content operations and growth instrumentation used by in-house teams and agencies.How many Developer products are listed on Harpd Rank?Developer tools are the largest single block of Harpd Rank participation: APIs, SDKs, editors, CI and infrastructure products that engineers evaluate before they commit a codebase to them.How many Productivity products are listed on Harpd Rank?Productivity tools are task managers, automation layers and focused utilities. The category skews toward products that replace several single-purpose tools rather than adding another one.How many Design products are listed on Harpd Rank?Design products cover interface, brand and asset creation tooling, judged on output quality rather than feature lists.How many Social products are listed on Harpd Rank?Social products cover publishing, community and audience tooling — the layer between a creator and their distribution.How many Writing products are listed on Harpd Rank?Writing products cover drafting, editing and long-form assistance — the category where AI assistance is most commoditized, so differentiation is thin.How many Business products are listed on Harpd Rank?Business products cover operations software — payments, invoicing, back-office automation and internal tooling — bought by teams rather than individuals.How many Education products are listed on Harpd Rank?Education products cover learning platforms and teaching tools, a category where the buyer and the user are often different people.How many Health products are listed on Harpd Rank?Health products are a small, deliberately curated Harpd category: tracking, coaching and clinical-adjacent software where accuracy claims matter more than feature count.How many Ecommerce products are listed on Harpd Rank?Ecommerce products cover storefronts, checkout and merchandising tooling for direct-to-consumer sellers.How many Hiring products are listed on Harpd Rank?Hiring products cover sourcing, screening and recruitment operations, typically sold to teams hiring in volume across regions.How many Crypto products are listed on Harpd Rank?Crypto products on Harpd Rank cover wallets, on-chain tooling and payment infrastructure, including the x402 agent-payment surface Harpd operates.How many Agencies products are listed on Harpd Rank?The Agencies board lists service businesses rather than software, which is why it is measured on the same board but read differently — a service listing is a capability statement, not a product release.How many Security products are listed on Harpd Rank?Security products are a small Harpd category by design: listings need verifiable claims about what they protect, and the board does not reward volume.How many Travel products are listed on Harpd Rank?Travel products cover trip planning, booking assistance and itinerary tooling.How many Domains products are listed on Harpd Rank?Domains covers naming, registration and domain-marketplace products, a narrow category where availability data is the core value.How many Leaderboards products are listed on Harpd Rank?Leaderboards is a meta-category: products that rank other things. It is small because the pattern is hard to do credibly without a data source of your own.How many Other products are listed on Harpd Rank?The Other board collects products that do not yet fit an established Harpd category. It exists so a legitimate product is never rejected purely for being early, and it is reviewed as new categories are created.How many products does Harpd Rank list?The count of approved products on the Harpd Rank overall board, as of the dataset's own data date. It moves only when a listing is approved or updated — never on a site rebuild.How many categories does Harpd Rank cover?Harpd operates a fixed taxonomy of category boards. Some boards are open but empty because no qualifying product has been approved into them yet — those boards still exist and still accept listings.How many Rank Points has Harpd Rank issued?Rank Points are permanent promotional placement: one completed Credit spend creates one Rank Point, and the total is the sum of promotional placement currently held across the board.Does it cost money to list a product on Harpd Rank?The entry price of Harpd Rank. Free submission is the design constraint that keeps the board filled with real products rather than paid slots; promotion is a separate, disclosed lever.Are Harpd Rank Points a quality score?The single most important disclosure on the platform. Rank Points measure promotional spend, not product quality, and Harpd states this on every ranked page rather than burying it in terms.How concentrated is Harpd Rank across categories?A concentration measure over the published category shares. It answers whether Harpd Rank participation is spread evenly or pooled into a few categories — useful context before quoting any single category figure.What is the largest category on Harpd Rank?The share held by the single largest category on Harpd Rank. This is share of Harpd Rank participation, not share of the global software market — the distinction is stated in the dataset itself.How many AI model prices does Harpd track?The size of the Harpd Model Pricing Dataset. Every record is a public list price read from the provider's own pricing page, carrying its source URL and verification date.What is the range of AI model input prices?The spread between the cheapest and most expensive published input price per million tokens in the Harpd Model Pricing Dataset — the clearest single number for how much model choice costs.What is the range of AI model output prices?Output tokens usually dominate a real bill, and their price spread is wider than the input spread. This is the cheapest-to-priciest range across the models Harpd tracks.Which AI model has the cheapest input price?The lowest published input list price in the Harpd Model Pricing Dataset, with its provider. Prices change without notice, so always confirm against the record's source URL before committing.Which AI model has the cheapest output price?The lowest published output list price in the Harpd Model Pricing Dataset. Cheap output is often the deciding factor for long-generation workloads such as drafting and summarisation.How many research families does Harpd publish?Harpd Research is organised into families, each tracking one recurring question over time. A family only publishes a month when that month's closed snapshot has enough listings to be meaningful.How many Harpd research reports are published?The count of research reports that have cleared Harpd's publication threshold. Reports are built from closed monthly snapshots, so the number grows as months close — not as the live board moves.How big is the Harpd Discovery Index?The Discovery Index is Harpd's non-sponsored coverage dataset: products observed and qualified from public sources, independent of whether they hold any Rank Points.