CallSine
- Company typePrivate
- Founded2021
- HeadquartersNorth Hampton, United States
- Headcount11–50
- GTM typeB2B
- OfferingSoftware
CallSine firmographics
Firmographics- Name
- CallSine
- Legal name
- CallSine LLC
- Website
- https://callsine.com
- Company type
- Private
- Founded year
- 2021
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Ownership category
- akta.pro rank
CallSine industry classification
Industry- Product category
- Sales Engagement Software
- NAICS
- Telemarketing Bureaus and Other Contact Centers (561422), Telephone Call Centers (56142)
- SIC
- Services-Computer Programming Services (7371), Telephone Communications (No Radiotelephone) (4813)
- akta.pro primary industry
- AI Integration & Orchestration Platforms (Connectors, Workflow, iPaaS for AI) (HDAEANAI)
- akta.pro secondary industries
- Conversational AI Platforms (chat/voice bots, orchestration) (HDAAAFAC), Telesales & Inside Sales Outsourcing (B2B/B2C) (BPAAADAE)
Keywords
Where CallSine is headquartered
LocationHeadquarters
- HQ city
- North Hampton
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
CallSine business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Personnel, Marketing or Sales, Infrastructure, Operations
Revenue model
- SaaS Subscription (Pilot Agent): Entry-level tier at $349/month providing 1 campaign agent, 1 email inbox, LinkedIn outreach, up to 20 net new contacts per day, 14-day analytics. Monthly billing.
- SaaS Subscription (Full Time): Mid-tier at $999/month for teams scaling personalized outbound with 2 campaign agents (expandable), up to 10 inboxes, up to 200 net new contacts per day with no total cap, all-time analytics, expanded content strategies and pre-launch testing, team collaboration.
- Enterprise Custom Subscription: Custom pricing for organizations needing multiple coordinated agents, custom workflows, and integrations. Includes custom number of campaign agents, up to 100 inboxes, unlimited net new contacts, full content strategies, coordinated agent workflows, data integrations.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | Entry-level autonomous agent for launching first outreach campaign |
| Subscription | Monthly | Scaled team tier with expanded agents and contact limits |
| Subscription | Monthly | Enterprise tier with unlimited contacts and custom workflows |
Go-to-market motion2 records
Distribution channels2 records
Marketing channels4 records
CallSine product offering
Product offeringCore offering
CallSine delivers a multi-agent AI orchestration platform for autonomous B2B sales outreach. The platform uses specialized AI agents to research prospects from LinkedIn, websites, and company data, generate personalized messages grounded in the user's own sales and marketing materials via RAG technology, and execute multi-channel cadences across email, LinkedIn, phone, and SMS. It includes modules for AI-led research, message generation, multi-channel sales engagement, email deliverability infrastructure, and AI-filtered verified contact data.
Product overview
CallSine is a multi-agent AI orchestration platform for autonomous outbound sales. The core AI Agent coordinates research, strategy, and multi-channel messaging across the platform. Sales Engagement module handles multi-channel sequencing and cadence orchestration across email, LinkedIn, calling, and SMS. Generation module creates personalized messages grounded in the user's actual sales materials using RAG technology. Email Infrastructure module manages deliverability through inbox rotation, warmup protocols, and health monitoring. Contacts module provides AI-filtered verified lead data for immediate campaign use. The platform is designed for B2B sales teams seeking to automate personalized outreach at scale, with pricing tiers ranging from entry-level (Pilot Agent at $349/month) to enterprise (Custom).
Differentiator
Problem solved
Functional benefit
Products and services
- AI Agent Central AI agent that handles research, strategy, and messaging for autonomous outbound sales. Pulls from LinkedIn, websites, and technographic data to understand each lead's context, role, and industry. Uses RAG technology to personalize outreach using the user's own sales materials and coordinates with other modules for multi-channel execution.
- Sales Engagement Multi-channel sequencing and orchestration module. Creates, optimizes, and executes outbound cadences across email, LinkedIn, calling, and SMS. Times each touchpoint based on lead behavior or reply status, and provides team-wide visibility and coordination to keep messaging consistent across the sales organization.
- Generation Message generation module that transforms case studies, pitch decks, and positioning docs into outbound messages tailored to each prospect's role, company, and context. Uses RAG technology to ground messaging in the user's actual sales materials, supports multi-agent quality control, and adapts messaging across email, LinkedIn, and phone channels.
- Email Infrastructure Email deliverability and infrastructure management module. Handles inbox creation, routing, warmup protocols, and health monitoring across multiple domains. Rotates inboxes and manages routing to ensure consistent delivery at scale, monitors deliverability, and alerts if performance drops. Purpose-built for high-volume outbound with sequencing and agent-led messaging.
- Contacts Verified contact data and AI-powered lead sourcing module. Agents find high-value leads with AI filtering and send them directly into live sequences, dialers, or LinkedIn workflows. Filters by firmographics, roles, and context, and includes verified phone and email data out of the box, enabling instant sync to campaigns without CSV exports or manual data cleaning.
Quantifiable outcome
- Dozens of autonomous agents already tested and deployed
- +1 more outcomes
Companies that use CallSine
Customer profileSegments2 records
Ideal customer profiles2 records
CallSine technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration6 records
AI capability7 records
Feature6 records
CallSine partnerships and signals
Strategic signalPartnerships
Five partnerships are on record, tiered core.
- BritivecoreStrategic integration embedding runtime identity authorization and Zero Standing Privileges into CallSine's multi-agent AI systems. Britive's dynamic identity security platform enables just-in-time, ephemeral access per agent action with automatic removal upon task completion. Integration is live for select customers with broader availability planned for Q1 2026. Addresses identity security challenges of autonomous agents operating at machine speed.
- LeadOnioncoreLeadOnion-powered Outreach Agent surfaces accounts and contacts showing substantive research behavior across 20+ sources. Combines account-level, person-level and website-visitor signals into unified data layer. Agent receives leads, validates contact info, removes duplicates, builds qualified outreach lists.
- SnitchercoreSnitcher-powered Outreach Agent identifies companies visiting website, how often, and what pages they're looking at. Agent continuously pulls visitor data, checks against personas, filters duplicates, validates emails before adding to outreach lists.
- Humantic AIcoreIntegration brings personality-driven insights into CallSine's content generation layer. Humantic identifies personality traits and communication styles, allowing agents to adapt tone, style, and framing to match prospect preferences. Best practice recommends Humantic's Unlimited tier for full-scale enrichment.
- RB2BcoreRB2B-powered Outreach Agent transforms visitor identification data into outreach-ready leads. Connects via webhook to continuously receive visitor data, validates emails, filters by persona, removes duplicates. Enables turning anonymous website visitors into booked meetings automatically.
Scale indicators2 records
Recent moves6 records
CallSine competitors and assessment
Company assessmentDirect peers
- Clay: AI-powered data enrichment and outbound platform that consolidates 100+ data sources for personalized outreach at scale. Listed as a CallSine integration partner and a direct competitor for lead sourcing and personalization workflows.
- Instantly.ai: High-volume cold email outreach platform with inbox rotation, warmup, and AI personalization. Direct overlap with CallSine's Email Infrastructure module and Pilot/Full Time tiers.
- Regie.ai: AI-driven sales engagement platform combining generative AI content with sales sequence automation. Comparable to CallSine's Generation module and multi-channel orchestration capabilities.
- Apollo.io: All-in-one sales intelligence and engagement platform combining a large B2B contact database with multi-channel sequencing. Direct competitor across CallSine's Contacts module and Sales Engagement capabilities.
- 11x.ai: AI-powered autonomous sales development platform offering 'Alice' SDR agent that handles prospecting, outreach, and lead qualification end-to-end. Closely comparable to CallSine's autonomous multi-agent sales vision and pricing model.
- Artisan (Ava): AI sales automation platform whose flagship 'Ava' agent autonomously runs outbound sales campaigns. Direct competitor in the agentic AI outbound space with similar product positioning to CallSine.
- Lemlist: Multi-channel outreach platform focused on personalized email, LinkedIn, and cold calling at SMB and mid-market. Comparable to CallSine's mid-tier Full Time offering with email warmup and sequencing.
Broad incumbents
- Salesloft (Drift): Enterprise sales engagement and conversation intelligence platform (now combined with Drift). Overlaps with CallSine's multi-channel orchestration and AI-driven messaging at the enterprise tier.
- Outreach: Enterprise sales execution platform providing multi-channel sequencing, AI-driven deal insights, and workflow automation. Broad incumbent whose Sales Engagement module overlaps with CallSine's core sequencing capabilities.
Emerging players
- Conversica: Conversational AI platform offering Revenue Digital Assistants for lead engagement and qualification. Comparable to CallSine's autonomous agent approach for sales conversations at enterprise scale.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
CallSine social profiles
Digital presenceCallSine financial estimates
Financial estimateRevenue estimate
Valuation estimate
CallSine leadership team
Management profileNumber of profiles
Profiles2 records
CallSine funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
CallSine M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about CallSine
What does CallSine do?
CallSine delivers a multi-agent AI orchestration platform for autonomous B2B sales outreach. The platform uses specialized AI agents to research prospects from LinkedIn, websites, and company data, generate personalized messages grounded in the user's own sales and marketing materials via RAG technology, and execute multi-channel cadences across email, LinkedIn, phone, and SMS. It includes modules for AI-led research, message generation, multi-channel sales engagement, email deliverability infrastructure, and AI-filtered verified contact data.
Is CallSine a public or private company?
CallSine is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was CallSine founded?
CallSine was founded in 2021. It employs 11 to 50 people.
Where is CallSine based?
CallSine is headquartered in North Hampton, United States, in the North America region.
How does CallSine make money?
Three revenue lines are on record. SaaS Subscription (Pilot Agent) is the primary driver. The others are saaS Subscription (Full Time) and enterprise Custom Subscription.
Who are CallSine's main competitors?
Direct peers on record are Clay, Instantly.ai, Regie.ai, Apollo.io, 11x.ai, Artisan (Ava) and Lemlist. Broad incumbents are Salesloft (Drift) and Outreach. Conversica is listed as an emerging player.
Does CallSine have an API?
No public API is recorded for CallSine.
What industry is CallSine in?
CallSine's product category is Sales Engagement Software. Its primary akta.pro industry code is HDAEANAI, AI Integration & Orchestration Platforms (Connectors, Workflow, iPaaS for AI), with a secondary code of HDAAAFAC, Conversational AI Platforms (chat/voice bots, orchestration). Its NAICS code is 561422 and its SIC code is 7371.