
Stripe
PayPal Braintree
Payoneer
Wise
Skrill
Amazon Pay
Square
PayPal is the faster, safer way to pay online without sharing financial details, send and receive money or accept credit and debit cards as a seller

AgentGatePay
x402
Real-world tasks your agent can't do alone.

Which is more popular?
Underscore Done might be a bit more popular than PayPal. We know about 1 link to it since March 2021 and only 1 link to PayPal.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | paypal.com | underscoredone.com |
| Pricing | ||
| Company | Startup from the United States | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of PayPal yet.
Underscore Done (_done) is a suite of pay-per-call utility APIs built for AI agents. No API keys, no subscriptions - agents pay per request with USDC via the x402 protocol
What each product offers, as listed by its team.


Possible disadvantages
No features have been listed yet.
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of Underscore Done yet.
Walkthroughs and reviews on video.
STOP Using PayPal - 5 Reasons You Should Stop Using PayPal in Your Business or On Your Website!
More videos
No Underscore Done videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing PayPal and Underscore Done.
Underscore Done's answer:
We provide data and actions that AI cannot achieve.
Also we don't require accounts, registration, api keys. And we charge per usage and never charge monthly subscriptions.
Underscore Done's answer:
Ai Agents that work on behalf of people.
Share your experience with using PayPal and Underscore Done. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


I used PayPal for years, but lately it’s been one of the most frustrating payment services I’ve dealt with. Their customer support feels almost nonexistent — long wait times, scripted replies that don’t solve...
You’re probably already familiar with PayPal, but this popular service deserves to be on the list of the best payment processing companies for its ease of use and ubiquity. It’s a good choice for small businesses...
The best payment method for freelancers varies based on individual needs. Wise and Revolut are excellent for their multi-currency account features and using the mid-market exchange rate, while PayPal is globally...
We have no reviews of Underscore Done yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


(I live in USA) When I go to payments under my shopify account to add paypal as a payment method I am having trouble doing so. I first click activate paypal > activate paypal express checkout which directs me to a "security challenge"... Source: over 3 years ago
_done is a catalog of small, pay-per-call utility APIs aimed at AI agents: things like DNS and WHOIS lookups, screenshots, OCR, hashing, QR codes, and SEO extraction. Every call costs one cent in USDC over x402. There's no account and no... - Source: dev.to / 11 days ago
When comparing PayPal and Underscore Done, you can also consider the following products.

Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.
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Enable AI agents to make autonomous payments with AP2 mandates and X402 protocol. Multi-chain crypto, budget controls, instant settlement.
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An all-in-one solution to accept, process, and split payments in your mobile app or online - from small business to large enterprise.
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An open protocol for internet-native payments from Coinbase
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Whether making international payments, receiving funds, managing your digital business, or accessing capital, Payoneer opens your business up to the world.
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Currency exchange Banks and other providers could charge you up to 5% in hidden costs when sending ...
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