Certainly
Sales
Create a digital twin of your best salesperson.
Like Clerk.io, Certainly is in the Sales category. Both are paid. Worth comparing on the detail page.
We've curated 41 of the best alternatives to Clerk.io, ranked by feature overlap, topic similarity, user ratings, and popularity. Certainly, Todook, and GetSales.io lead the list as the closest matches.
Updated May 18, 2026
The list includes 4 freemium, 33 paid, and 4 with a free trial, so whether you're looking for a no-cost replacement or a more capable paid tier, there's an option to compare. Clerk.io itself is paid, which makes paid alternatives the most natural starting point.
Many of these tools cluster around use cases like Sales Automation, Lead Generation, Sales, and Customer Engagement — the same problem spaces Clerk.io addresses. Cross-referencing tools that overlap on multiple topics gives a more reliable signal than category alone, because two products in the same category can still serve very different workflows.
Our ranking weighs eight signals: shared category, topic overlap, feature overlap, name and description text similarity (via PostgreSQL's pg_trgm and tsvector), Bayesian-smoothed user ratings, pricing-model match, popularity, and editorial overrides. Scores are then normalized within each tool's own candidate pool so the top match always represents the strongest available alternative.
Use the table of contents below to jump to free or paid alternatives, or scroll down to compare each option side-by-side with Clerk.io.
Ranked by compatibility score
Sales
Create a digital twin of your best salesperson.
Like Clerk.io, Certainly is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
Build advanced AI chatbots for WhatsApp and more.
Like Clerk.io, Todook is in the Sales category. Both are paid. Worth comparing on the detail page.
0 free and 4 freemium options.
4 free or freemium alternatives to Clerk.io on /tools/clerk-io/alternatives.
33 paid options.
17 additional candidates
Certainly ranks as the highest-scoring alternative to Clerk.io, based on shared category, topic overlap, feature similarity, and user ratings. Ratings are still being collected for this tool.
Yes — 0 fully free and 4 freemium alternatives are available, including Kundy, NexxtSupport, and Apollo.
Certainly is similarly priced (paid) and sits in the same category (Sales). View its detail page to compare features, integrations, and reviews side-by-side.
Top Sales alternatives include Certainly, Todook, GetSales.io, and Kalendar. These tools share the same primary category and have meaningful topic overlap with Clerk.io.
Neither Clerk.io nor Certainly has user ratings yet — be the first to review either tool to help future visitors compare them.
Sales
AI-powered B2B sales engagement platform
Like Clerk.io, GetSales.io is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
Book new revenue on autopilot with AI sales agents
Like Clerk.io, Kalendar is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
AI-powered lead generation for LinkedIn & email
Like Clerk.io, Outreachly is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
Double conversions with AI-powered customer conversations
Like Clerk.io, MagicForm is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
AI-powered assistant for B2B sales outreach
Like Clerk.io, Jason AI is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
A.I. power for professional communication and sales
Like Clerk.io, Sales Stack is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
Supercharge B2B sales with AI-powered lead generation
Like Clerk.io, B2B Rocket is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
AI-powered sales automation to grow your pipeline
Like Clerk.io, AiSDR is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
One chatbot to replace them all.
Like Clerk.io, Chatbros is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
Automate sales engagement and close deals faster.
Like Clerk.io, SendBuzz is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
Automate sales with AI calling and lead nurturing.
Like Clerk.io, Structurely is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
AI-powered sales agents for limitless customer interactions.
Like Clerk.io, NL Pearl is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
AI voice bots that automate sales processes
Like Clerk.io, VoiceGenie is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
AI-powered platform for seamless product selection and quoting.
Like Clerk.io, Parspec is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
Scale deal-winning behavior with automated sales playbooks
Like Clerk.io, Sharpsell is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
AI-powered sales funnel automation for effortless lead conversion
Like Clerk.io, PipeLime is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
Meet Mia: Your AI sales rep that books meetings.
Like Clerk.io, Topo AI is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
Unlock sales opportunities with AI-powered business intelligence.
Like Clerk.io, Lasso AI is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
Empower sales with AI-driven voice bots
Like Clerk.io, PreCallAI is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
Allbound platform for inbound and outbound success powered by intent.
Like Clerk.io, ServiceBell is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
AI agents supercharge sales outreach 24/7
Like Clerk.io, Buena.ai is in the Sales category. Both are paid. Worth comparing on the detail page.
Sales
AI-powered sales assistant for smarter, automated outreach.
Like Clerk.io, AI Sales Assistant is in the Sales category. Both are paid. Worth comparing on the detail page.
27 more paid alternatives listed below. Browse all Clerk.io alternatives ↓
33 paid alternatives to Clerk.io on /tools/clerk-io/alternatives.
Like Clerk.io, OpenFunnel is in the Sales category. Both are paid. Worth comparing on the detail page.
