Best Inside Sales Software

Groove is a Salesforce-native sales engagement platform that helps revenue teams capture activity, automate outreach, and manage the sales journey in one workspace. It syncs email, calendar, and CRM data automatically, uses AI to draft and personalize outreach emails, and runs multi-channel Flows across email, calls, LinkedIn, and direct mail. Real-time buyer signals and pipeline reporting help managers track deal progress without leaving Salesforce.

Clari acquired Groove in August 2023 and folded it into its Revenue Platform as "Groove by Clari." The product keeps the Groove name and features, but its web app now runs on a Clari subdomain. In December 2025 Clari merged with Salesloft, a competing sales engagement tool, giving the combined company two overlapping products with no announced consolidation date.

Reply.io is a sales engagement platform that helps sales teams and agencies automate B2B outreach across email, LinkedIn, calls, SMS, and WhatsApp. It combines a built-in B2B contact database with AI-driven personalization, letting users build multichannel sequences that adapt automatically based on prospect replies and actions rather than fixed scripts.

The platform includes Jason, an AI SDR agent that can source prospects, write sequences, and book meetings in either autopilot or copilot mode. Reply.io also provides deliverability tools such as mailbox warm-up and health monitoring, a unified inbox for replies, detailed reporting, native CRM integrations, and an API for custom workflows, making it suited for founders, sales teams, and agencies running outbound campaigns.

Salesloft is a revenue orchestration platform that helps B2B sales teams manage the full selling process, from prospecting to closing. It combines multi-channel sales cadences, conversation intelligence, deal management, and AI-driven forecasting into one workspace so sellers and revenue operations teams can prioritize the right accounts and actions. The platform syncs with CRM systems like Salesforce and HubSpot to keep activity and pipeline data up to date automatically.

Founded in 2011 and headquartered in Atlanta, Georgia, Salesloft serves thousands of B2B companies including IBM, Stripe, and 3M, mostly mid-market and enterprise sales organizations. In 2025 Salesloft merged with revenue intelligence company Clari to expand its forecasting and analytics capabilities. Pricing is quote-based, and access is arranged through a sales consultation rather than self-service signup.

Klenty is a cloud-based sales engagement platform that helps B2B sales teams automate and personalize outbound prospecting across email, phone, SMS, and LinkedIn. Headquartered in Palo Alto, California, with a product team in Chennai, India, Klenty serves more than 5,000 customers worldwide. The platform combines AI-driven cadence building, account research, and email deliverability tools with a proprietary dialer infrastructure, letting sales development reps and account executives spend less time on manual list building and follow-ups and more time on live conversations.

Klenty integrates natively with CRMs such as Salesforce, HubSpot, Pipedrive, Zoho, and Microsoft Dynamics, syncing calls, emails, and engagement data automatically. Additional capabilities include AI call coaching, live call transcription, voicemail drop, A/B testing, and detailed analytics dashboards. Klenty offers a 14 day free trial with no credit card required, and paid plans are billed quarterly or annually.

Outreach is a sales engagement and revenue orchestration platform built for B2B sales, marketing, and revenue operations teams. Founded in 2014 and headquartered in Seattle, Washington, the company helps sellers plan and execute multi-channel outreach across email, calls, and social touches through automated sequences, while tracking every prospect interaction in one workspace.

The platform layers agentic AI on top of this workflow, offering research, personalization, meeting prep, and deal agents that act on a seller's behalf, alongside conversation intelligence, coaching, and AI-assisted forecasting. Outreach integrates with Salesforce, Microsoft Dynamics 365, Gmail, Outlook, Slack, and Zoom, and is used by enterprise teams at companies such as Zoom, Snowflake, Databricks, and Siemens.

Apollo.io is an AI sales platform that combines a B2B contact database with outreach automation and deal execution tools for revenue teams. Its database covers more than 210 million contacts and 35 million companies, searchable through the web app or a Chrome extension. Sales teams use Apollo to build multichannel outbound sequences across email, calls, and LinkedIn, qualify inbound leads, and manage pipeline and deals, with conversation intelligence that records calls and generates AI summaries.

Founded in 2015 and headquartered in San Francisco, Apollo is used by startups through large enterprises, including Ernst and Young, Oracle, and Lyft. It offers a free Starter plan, paid Basic and Professional plans billed per user, and custom Enterprise pricing; paid tiers include a free trial. Apollo integrates with Salesforce, HubSpot, Outreach, SalesLoft, and Marketo, and provides a public REST API on all plans.

Mixmax is an AI-native sales engagement platform that runs inside Gmail and Outlook, helping sales, customer success, and recruiting teams manage email outreach, meetings, and follow-ups without leaving their inbox. Its three core modules, Inbox Copilot, Meeting Copilot, and Engagement Copilot, cover email tracking, inbox triage, meeting preparation and recaps, and multi-channel sequences across email, LinkedIn, and SMS. Founded in 2014 and based in San Francisco, Mixmax serves more than 10,000 revenue teams worldwide.

The platform includes one-click meeting scheduling, AI-assisted email composition, interactive email content such as polls and surveys, and two-way Salesforce integration alongside 40 plus other native integrations. Teams can automate follow-up sequences, track opens and clicks in real time, and view engagement analytics from a single dashboard. Mixmax offers a free plan, a 14-day free trial of its paid Copilots, and enterprise-grade security including SOC 2 Type II and HIPAA compliance.