Instantly

Instantly is an AI-powered cold email platform that has quickly become one of the most popular tools for B2B outreach. Built specifically for agencies and sales teams who need to send high-volume cold email without sacrificing deliverability, the platform combines automated warmup, smart sending, and campaign management into a clean, intuitive interface.

The platform's standout feature is its warmup network. Before you send a single cold email, Instantly builds your sender reputation by simulating real email conversations between accounts in their network. This automated warmup process is critical in 2026, where Google and Microsoft have become increasingly strict about flagging unknown senders. The warmup runs in the background and continues even after you start sending campaigns, maintaining your reputation over time.

One of Instantly's biggest advantages is unlimited email sending accounts at no extra cost. Most competitors charge per account or per seat, which adds up quickly when you're running outreach across multiple domains and inboxes (which you should be doing for deliverability). With Instantly, you connect as many accounts as you need and the platform handles rotation automatically.

The campaign builder is straightforward — write your email sequence, set your sending schedule, upload your leads, and launch. The AI writer can help generate variations, and A/B testing lets you optimize subject lines and copy over time. The Unibox feature pulls all replies from all connected accounts into one inbox, so you're not switching between email accounts to manage conversations.

For agencies, Instantly offers dedicated workspace features that let you manage multiple clients from a single dashboard. Each client gets their own campaigns, accounts, and analytics without cross-contamination. This is a major selling point for agencies running outreach for 10+ clients simultaneously.

The platform also includes a B2B lead database (Lead Finder) that lets you search for prospects by industry, company size, location, and job title. While the database is newer compared to established players like Apollo or ZoomInfo, it's growing rapidly and eliminates the need for a separate data tool for basic prospecting.

Pricing starts at $37/month for the Growth plan (1,000 active contacts, 5,000 emails monthly), scaling to $97/month for Hypergrowth and $297/month for Light Speed. All plans include warmup. The pricing is competitive, especially considering the unlimited accounts feature — most competitors charge significantly more for similar volume.

Instantly works well as part of a broader GTM stack. Many teams use Clay for data enrichment and list building, then push prospects into Instantly for outreach. The platform integrates with major CRMs (HubSpot, Salesforce, Pipedrive) and automation tools (Zapier, Make) for seamless workflow connectivity.