How do their growth rates compare?

Cradle has a month-over-month growth rate of -22.3%; Surf has -18.9%.

How does pricing compare?

Cradle: Contact for Pricing. Pricing is not publicly listed. Cradle uses a contact-for-pricing model where teams discuss their project and program scope directly with the company; a licensing track and API access are offered alongside the core platform. Surf: Free, Pro, Max, API credits. Surf publishes a tiered pricing page covering Free, Pro, and Max plans alongside API credit packages, with annual billing options and Studio credits bundled at higher tiers. Exact figures change over time, so check the official pricing page before purchasing.

What are alternatives to Cradle and Surf?

Other tools in related categories include LuxAlgo, MacroMicro, Dr.Oracle, Uizard, Aime.

Cradle vs Surf — Traffic (16.99K vs 116.25K), Pricing & Verdict

Open AI Tools

Cradle vs Surf — Traffic (16.99K vs 116.25K), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	Cradle	Surf
Official Domain	cradle.bio	asksurf.ai
Pricing Model	Contact for Pricing	Free, Pro, Max, API credits
Monthly Visits	16.99K (16,993)	116.25K (116,252)
MoM Traffic Delta	-4.88K (-22.3%)	-27.18K (-18.9%)
Primary Market & Share	🇳🇱 Netherlands (47.6%)	🇰🇷 South Korea (32.6%)
Direct Visits / mo	6.21K	88.81K
User Rating	4.5	4.2
Supported Platforms	Website	Website

Cradle

Engineer better proteins, faster, with AI

De novo protein design

Start from a target or your own sequence and have Cradle design an optimized plate of candidates informed by your data and domain knowledge.

Parallel multi-property optimization

Improve efficacy, developability, and manufacturability in parallel rather than one property at a time, compressing time to a target profile.

Closed-loop learning from experimental data

Every round incorporates results from the previous one, so experimental data compounds across campaigns and prior failed programs stay useful.

Full API access

Everything in the web application is exposed through the API, so computational teams can script campaigns and wire Cradle into existing pipelines.

Strengths & Pros

+Optimizes multiple protein properties in parallel rather than sequentially, which can cut the number of experimental rounds
+Learns from a customer's own experimental data, including negative and failed results
+Covers antibodies, enzymes, vaccines, and peptides in one platform
+Full API parity with the web app supports computational and automated workflows