One platform.
Marketing, Messaging, and AI working together.
Harp helps businesses communicate smarter, automate faster, and deliver better customer experiences; with marketing, messaging, and AI working together.
Loved by next-generation teams
◆ The Harp Suite
Harp is built as a modular platform. Use one product or combine all three to create a complete customer experience engine.
Marketing that feels personal, not spammy
Harp Engage helps teams plan, personalize, and automate marketing campaigns that customers actually open and respond to.
People
Organize contacts with clarity and structure
Manage People, Organizations, and Groups in one centralized contact system. Harp Engage keeps your data clean, connected, and easy to segment, making personalization, targeting, and collaboration seamless across teams.
Engage
Reach your audience on every channel that matters
Create and send Email, SMS, and Push Notifications from one unified platform. Harp Engage lets you run multi-channel campaigns without switching tools—so your messages reach the right people, at the right time, on the channels they already use.
Sequence
Automate journeys with smart sequences
Build automated sequences that guide your audience from first touch to conversion. Trigger messages based on actions, time, or behavior, and let Harp Engage handle follow-ups consistently so no opportunity slips through the cracks.
Sending Domain
Improve deliverability with sending domains
Set up and manage dedicated sending domains to protect your brand reputation and improve inbox placement. Harp Engage gives you full control over authentication and sender identity, ensuring your messages are trusted and delivered reliably.
Integration
Connect effortlessly with your existing tools
Integrate Harp Engage with the platforms you already use. From CRMs to internal systems, our integrations make it easy to sync data, trigger campaigns, and keep your workflows connected without complex setup.
Transactional messaging built for scale and reliability
Send high-priority transactional messages via SMS, Email, and other supported channels. Harp Messaging is built for speed, uptime, and consistency.
Transactional Messaging
Deliver critical messages instantly and reliably
Send high-priority transactional messages via SMS, Email, and other supported channels. Harp Messaging is built for speed, uptime, and consistency—so important notifications reach users exactly when they should.
Messaging Insights
Real-time delivery insights
Gain real-time visibility into how your communications perform. Track delivery rates, engagement metrics, and channel performance to optimize customer experiences and maintain 90%+ deliverability.
Sender ID
Sender ID management you can trust
Create, register, and manage multiple Sender IDs in one place. Harp Messaging ensures your messages are sent with verified identities improving brand recognition, compliance, and delivery success across regions.
APIs Integration
Developer-friendly APIs and integrations
Integrate transactional messaging directly into your product with clean APIs and pre-built integrations. From authentication messages to system alerts, Harp Messaging fits naturally into your existing infrastructure.
AI virtual employees that work like your best team members
inSync learns from your documentation, workflows, and policies to respond accurately and consistently.
Knowledge Training
Train on Your Business Knowledge
Upload SOPs, FAQs, policies, and internal documents. inSync learns your processes and responds using your exact standards, tone, and procedures — not generic AI answers.
Multi-Agent Workspace
AI Employees for Every Role
Create specialized AI employees for: Customer Support, Marketing, Operations, Data & Analytics, Internal Productivity etc. Each AI has a defined role, permissions, and responsibilities — just like a real team member.
Conversations
Centralized AI Collaboration
Manage all AI interactions in one workspace. Real-time chat interface, Add or switch AI agents mid-conversation, Human-in-the-loop approvals, Multi-agent collaboration. Your AI and human team work side-by-side seamlessly.
Integration
Connected to Your Entire Stack
Integrate inSync with your CRM, email platform, databases, and internal tools. Your AI employees can: Retrieve data, Update records, Trigger workflows, Execute actions. Not just respond — but act.
◆ Why Harp?
Why teams choose Harp
All-in-one platform
Marketing, messaging, and AI—fully connected in one system.
Built for growth
Works seamlessly for startups and scales effortlessly with teams.
Less complexity
Fewer tools, fewer tabs, cleaner workflows.
Reliable delivery
Messages reach inboxes, devices, and channels consistently.
AI-powered execution
Automate decisions, actions, and workflows with intelligent agents.
Why Harp?
Integrate transactional messaging directly into your product with clean APIs and pre-built.
◆ Use cases
Built for modern teams
launch fast without heavy tooling
Get up and running quickly with a flexible platform that grows with you, without complex setup or bloated systems.
centralize customer communication
Bring all customer interactions across email, messaging, and automation into one organized, easy-to-manage platform.
Build better customer experiences with Harp
Whether you need marketing, transactional messaging, AI—or all three—Harp gives you the tools to create remarkable customer experiences.
The fastest growing businesses
use Harp
◆ FAQ (FAQs)
Frequently asked questions
Yes, we offer a 14-day free trial with full access to all features. No credit card required to start.
You can cancel your subscription at any time. Your access will continue until the end of your current billing period.
We offer monthly and annual billing options. Annual plans come with a 20% discount. All plans include automatic billing and can be upgraded or downgraded at any time.
All data is encrypted at rest and in transit. We use industry-standard security practices and comply with GDPR and other data protection regulations. Your data is never shared with third parties.
Yes, you can upgrade or downgrade your plan at any time. Changes take effect immediately, and we'll prorate any charges or credits.
We offer a 14-day free trial, detailed documentation, live demos, and dedicated customer support. Our implementation team can also help ensure smooth onboarding.
You'll be charged automatically at the start of each billing cycle via your preferred payment method. We accept all major credit cards and offer invoicing for annual plans.