Authoritas Link Building vs ColdSEO

Authoritas Link Building is a web and API toolkit for SEO and PR teams managing prospects, outreach campaigns, and link results. Users can find niche influencers, see which websites they write for, locate social profiles, and add prospects to a link-building CRM. Campaign tools support multiple campaigns, competitor link research, link imports, task creation and assignment, and result reporting. The product describes tracking for natural and paid links. Authoritas lists connections to Google Search Console, Google Analytics or Adobe Analytics, Google AdWords, Google Lighthouse API, Majestic, and OpenAI GPT-3 API. Its SEO data page says the database covers more than 125 million commercial keywords in 50 countries, with backlink data from Majestic. The free SEO plan includes two websites, 1,000 keyword rank credits per month, and one user, and must be accessed at least once every 30 days to remain active. Paid plans start with Essential at £99 a month; Expert costs £459 a month and Business costs £679 a month. Support includes a help centre, live chat during UK office hours, email, and weekday phone support from 08:00 to 18:00 UK time.

ColdSEO is a link-building outreach platform for SEO professionals, combining prospect discovery, personalized email campaigns and backlink monitoring. Prospect Finder searches by keyword, competitor backlinks, content topic or uploaded domains, with filters for authority, traffic, language, country and spam score. Hunter.io helps locate verified email addresses and check them before a campaign sends. Anthropic’s Claude API generates a tailored opening sentence for each prospect. Campaigns can send through Gmail, Google Workspace, Microsoft 365 or custom SMTP. Replies are threaded and categorized, and campaigns periodically check replied prospects’ sites for links to a chosen target URL. Deliverability controls include inbox rotation, send caps, warmup and unsubscribe mechanisms. ColdSEO offers web and API access, but API access is not included in its plans. The free plan has one inbox, 50 prospect credits and 100 sends per month, 25 AI personalizations and one active campaign. Pro is $79 a month; Agency is $199 a month. Monthly credits expire, and campaigns pause at the cap.