Sending personalized and targeted emails to new prospects without a cold email tool results in wasted time and resources. That’s why building backlinks is important for SEO agencies because it signals to search engines that a website is credible and authoritative.
You’d want a cold email tool that simplifies outreach by providing essential features such as email warm-up, campaign automation, and CRM integration. As such, this article will examine Instantly and five other cold email tools that offer significant benefits for SEO agencies aiming to build high-quality backlinks.
Comparison of the Top 6 Cold Email Tools for Backlink Building
| Tool | Top Features | Starting Price |
| Instantly | AI Copilot, Email Deliverability Network, and Instantly CRM | $30.00/month |
| Smartlead | AI-Powered WArm Up and Smart Replies | $39.00/month |
| Reply | Reply Handling | $49.00/month |
| Saleshandy | Unified Inbox | $25.00/month |
| Mailshake | SHAKEspeare AI Email Writer | $25.00/month |
| GMass | Mail Merge Email Personalization | $18.00/month |
1. Instantly
Instantly combines features like cold email automation with access to over 450 million verified contacts, unlimited email warm-up, and a unified inbox, all of this is done within one user-friendly platform to ensure that SEO agencies build backlinks with ease. Its primary goal is to reduce agencies’ costs while delivering a system that guarantees success in all areas.
It stands apart from the competition because even at $30 per month (billed annually), it offers unlimited email accounts, making it highly budget-friendly for agencies with massive campaigns. Instantly also offers cutting-edge features such as AI-enabled email customization, email account rotation, and a large contact database, which enhances deliverability, return rates, and scalability.
-> Looking for more email marketing help? Check out out email examples to power your campaigns.
Key Features of Instantly
- AI Copilot: Aids clients in finding leads, generating customized email sequences, and creating campaign ideas.
- Email Deliverability Network: Ensures that customers’ emails are kept out of spam and enhances their email send reputation through positive email interactions.
- Instantly CRM: Helps in the management of workflows and campaigns, as well as hyper-personalizing emails with AI-driven assistants to streamline outreach.
- Done-For-You Email Accounts: Automates the setup of email addresses for cold email outreach, including domain purchase, inbox creation, warm-up, and email verification.
- Inbox Placement: Ensures that cold emails are delivered to inboxes and not marked as spam, using automated warm-up and sender authentication.
2. Smartlead
Smartlead is a cold email platform built for agencies and SaaS teams that want to scale backlink outreach without sacrificing deliverability. It combines unlimited mailboxes, AI-powered warmup, and advanced infrastructure features so your link-building campaigns land in the inbox instead of spam. For SEO and digital PR teams sending large volumes of personalized pitches, Smartlead turns cold outreach into a consistent, trackable pipeline of backlink opportunities.
Unlike generic outreach tools, Smartlead is engineered around deliverability. AI-driven email warmup, humanized sending patterns, and smart replies help maintain a strong sender reputation so even high-volume backlink campaigns remain safe under the latest Gmail/Yahoo rules. A unified “Master inbox” centralizes replies from every mailbox, making it easy to manage journalist and webmaster conversations without losing context.
Key features of Smartlead for backlink outreach
- AI-powered warmup and deliverability: Real-time AI learning optimizes warmup, send patterns, and ESP matching to keep outreach out of spam, even at scale.
- Unlimited mailboxes: Connect and rotate as many mailboxes as needed to safely scale link-building campaigns across brands, markets, and client accounts.
- SmartSenders: Buy domains and email accounts directly from Smartlead’s marketplace, with automated SPF, DKIM, and DMARC setup so link-building teams don’t have to manage technical infrastructure manually.
- SmartServers: Use dedicated, high-deliverability servers and multi-server clusters to protect IP reputation, spread risk across servers, and maintain stable inbox placement for high-volume campaigns.
- AI personalization & SmartAI Bot: Integrations with tools like Clay plus Smartlead’s own SmartAI Bot let you generate persona-specific, highly personalized cold emails in bulk; perfect for at-scale outreach to site owners, editors, and bloggers.
- Centralized lead & reply management: The Master inbox and intent categorization features keep all replies organized, highlight positive responses, and ensure your team never misses a link opportunity.
3. Reply
Reply is a customer relationship management system that employs automation for multi-channel marketing to help agencies connect with potential clients. It also enables email outreach at scale with customization and automation, particularly to grow link-building efforts by augmenting reply rates and personalized messages. Starting at a price point of $49 per month for the annual plan, its features include reply handling, advanced analytics, and seamless CRM integration, which provides workflow automation, synchronizes data, and creates a cohesive experience.
-> Need help running your campaigns? Check out our list of the top email marketing services.
Pros of Reply
- Reply is easy to use because it simplifies the sales routine with impactful features.
- The automation abilities amplify email campaigns and integrate seamlessly with CRM.
Cons of Reply
- This platform has software bugs that sometimes confuse and hinder usability.
- There are integration issues that affect workflow and campaign management.
4. Saleshandy
Saleshandy assists in the automation and optimization of email outreach by offering features like targeted email marketing and real-time email tracking, which notifies you when an email is opened or a link is clicked. These features enable agencies to build backlinks efficiently, saving them time, effort, and resources. Saleshandy also integrates with email service providers and client management systems to facilitate seamless, targeted email marketing. Its pricing begins at $25 per month, paid annually.
-> Looking to create amazing newsletters? Visit my hand-picked list of the best email newsletter tools.
Pros of Saleshandy
- Email tracking abilities enhance outreach and ensure high interaction rates.
- Customer support is helpful in resolving challenges quickly.
Cons of Saleshandy
- The system has warm-up issues due to its reliance on a third party.
- There are limited features that hinder data analytics abilities.
5. Mailshake
Mailshake is a platform that simplifies email communication for SEO agencies. With a price point of $25 per month for the annual plan, its features help agencies build backlinks through customized email sequences and follow-ups that improve engagement. Main features include SHAKEspeare AI email writer, A/B testing, CRM integration, and a multi-channel outreach that allows users to automate outreach campaigns on phone, email, and LinkedIn from one platform.
-> Looking to avoid email blacklists? Read our guide to avoid email blacklists.
Pros of Mailshake
- Mailshake has an easy setup, even for people with little to no technical skills.
- It has time-saving features like mail merge and SHAKEspeare.
Cons of Mailshake
- Customization is limited when it comes to composing emails.
- Users may experience slow performance when analyzing data.
6. GMass
This platform works seamlessly with Gmail, allowing agencies to send mass emails and merge emails directly from their Gmail account. GMass provides large-scale, highly customized outreach campaigns, automated follow-up, and in-depth data analysis. At a price point of $18 per month billed annually, agencies can build high-quality backlinks more effectively.
-> Want to learn if your email campaigns are working? Read our guide to calculate email conversion rate.
Pros of GMass
- Seamless integration with Gmail makes campaign outreach smooth.
- The email tracking feature enhances users’ ability to send customized bulk emails.
Cons of GMass
- It has a steep learning curve for users.
- The software lacks customization and essential features.
Build Your SEO Agency’s Backlinks with the Right Cold Email Tool
Finding the right tools to create backlinks can sometimes be challenging for SEO agencies due to the decreasing response rates in cold outreach. This is because website owners get a huge number of similar pitches, resulting in many emails being ignored or deleted. Thankfully, this article points you in the right direction by providing five cold email tools SEO agencies use to create backlinks with features that enhance personalization, optimization, and automation of cold email outreach.
Amongst these listed cold email tools, Instantly leads the pack due to its focus on deliverability, CRM integration, and access to over 450 million contacts. The choice is clear; begin your backlink building journey today with Instantly and make every outreach a successful one.
