If you're looking for a Domainr alternative, you might want to check out EstiBot. EstiBot provides advanced domain name appraisals and investment tools, including instant appraisals, advertiser bid tools, lead generation, expiring domain lists, and market research. It also offers bulk WHOIS lookups and an API for data integration, so it's good for both experienced and new domain investors.
Another option is Host.io. Host.io is an API-based system that provides a broad set of domain name data, including DNS information, scraped website content, and backlinks. It can be used for a variety of use cases, including cybersecurity, brand protection, and market research. The API is designed to be scalable and is available through a variety of pricing tiers, including a free option, so it's good for developers who want to build domain data into their apps.
You may also want to check out One Word Domains. This service gives you access to more than 1.2 million brandable one-word domain names across 93 TLDs. It offers minute-by-minute availability updates and filters for popularity scores, so it's a good option for startup founders and entrepreneurs looking for memorable domain names. The lifetime membership option is a good option if you don't want to pay monthly.
Last, Namify is an AI-powered tool that suggests business name ideas and checks domain, social media and trademark availability. It also offers free logo options for some domain extensions. Namify is geared for entrepreneurs and startups, so it's a good option if you want to quickly and easily establish a professional brand.