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Comparison

ComplainAI vs AirHelp vs DoNotPay: Which Should You Use?

There are three main ways to fight a travel company without hiring a lawyer: a claims company that runs the case for a cut of your payout (AirHelp), a general consumer-rights subscription (DoNotPay), or a flat-fee letter generator that arms you to claim it yourself (ComplainAI). The short version: AirHelp takes 35% of your compensation as a success fee; DoNotPay charges a recurring subscription whether or not you have a claim; ComplainAI charges from US$3 flat and you keep 100%. Here's the honest breakdown — including when each one is the right choice.

Transparency note: this comparison is written by ComplainAI. Competitor fees below come from their published price lists as of July 2026 — always check their current pricing.

Side-by-side comparison

ComplainAIAirHelpDoNotPay
PriceFree to generate and read; US$3 per letter or up to US$25/year unlimitedFree upfront; 35% success fee on your payout, plus 15% more if legal action is needed (up to 50% total)Recurring subscription (~US$36 per billing cycle as of July 2026), paid whether or not you claim
Commission on your compensation0% — you keep everything35–50%0%
Who deals with the companyYou — you send a letter written for you, and the company pays you directlyAirHelp — they run the claim and pay you after deducting feesMostly you, using their templates and bots
ScopeTravel only: flights, baggage, hotels, car rentals, cruises, booking platformsFlights only (delay, cancellation, denied boarding)Everything: parking tickets, subscriptions, spam, some travel
Legal groundingLetter cites the exact law for your route — APPR, EU261/UK261, US DOT rules, Montreal ConventionStrong on EU261; handles the law internally rather than showing youGeneric templates, mostly US-oriented
Speed to action~2 minutes to a finished letterMinutes to file; weeks to months for them to resolveMinutes per tool
Best for Canadians (APPR)Yes — APPR sections and amounts are cited in the letterPartial — focused on EU/US routesLimited Canadian coverage

When AirHelp is the right choice

AirHelp makes sense when you genuinely don't want to touch the claim: they file it, argue it, and if needed litigate it, and you pay nothing unless they win. That full service is real — and so is the price. On a €600 EU261 claim, their standard 35% service fee leaves you €390, and if the case goes to their legal team the combined fees can reach 50%, leaving €300. If your claim is straightforward — a documented long delay on a covered route — the airline usually pays on a properly-cited demand letter, and paying a third of your compensation for that letter is expensive.

When DoNotPay is the right choice

DoNotPay is built for volume: if you constantly fight parking tickets, cancel free trials, and dispute small charges, one subscription covers all of it, and the travel tools come along for the ride. But if your problem is specifically a flight, a hotel, or a suitcase, you're paying a recurring fee for dozens of tools you won't use, and the travel letters are generic rather than grounded in the specific regulation for your route.

When ComplainAI is the right choice

ComplainAI is built for one job: turning your travel problem into a formal demand letter that cites the exact law — the APPR section and dollar amount for a Canadian delay, the EU261 article for a European cancellation, the Montreal Convention limit for destroyed baggage — with the amount and a response deadline filled in. You read the whole letter for free before paying anything, pay from US$3 flat to download or send it, and every dollar the company pays goes to you. It covers hotels, car rentals, cruises, and booking platforms, not just flights — the only thing it doesn't do is chase the company for you afterwards.

Frequently asked questions

What is the best alternative to AirHelp?
It depends on how much work you want to do. If you want a company to run the whole claim for you and don't mind giving up 35% of your payout (per AirHelp's published price list, or up to 50% if legal action is needed), AirHelp works. If you're comfortable sending one letter yourself and want to keep 100% of your compensation, ComplainAI writes the legally-cited demand letter for a flat fee starting at US$3.
Does ComplainAI take a percentage of my compensation?
No. ComplainAI charges a flat fee — from US$3 for one letter, up to US$25 per year for unlimited letters — and you keep 100% of whatever the airline or travel company pays you. It never takes a commission.
Is DoNotPay good for flight compensation claims?
DoNotPay is a broad consumer-rights subscription covering everything from parking tickets to free-trial cancellations, with some travel tools included. It charges a recurring subscription fee (about US$36 per billing cycle as of July 2026) whether or not you have a travel claim. For travel-only problems, a travel-specific tool that cites APPR, EU261, and Montreal Convention rules in the letter is usually a better fit.
Do I even need a service to claim flight compensation?
No — you can always write to the airline yourself for free, and regulators like the Canadian Transportation Agency and the US Department of Transportation accept complaints directly. Services exist because form letters without legal citations are easy for airlines to ignore, and researching the exact regulation, amount, and deadline for your route takes hours. Whichever route you choose, never pay anyone a large upfront fee just to 'review' your claim.

See your letter before you pay anything

Describe what happened and read the full legally-cited letter for free — then decide.

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Results in ~60 seconds · cites the exact laws for your situation