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Overall Rating

Senders.co is a specialized email deliverability and infrastructure agency that helps businesses maximize their email outreach success by ensuring optimal deliverability.

New York, New York, USA
$150-$200 USD per hour
10 - 49 employees

Senders.co is an agency specializing in email deliverability and infrastructure. They provide tailored solutions to ensure emails reach the intended inbox, reducing risks of deliverability failures. Their expertise spans email warm-up protocols, domain authentication, and maintaining sender reputations. Working with a variety of clients across industries, they prioritize high-volume sending while mitigating the risks of spam filtering, offering comprehensive deliverability consulting to optimize email campaigns.

Services

  • Email deliverability consulting
  • Domain and DNS setup
  • DMARC, SPF, and DKIM configuration
  • Email warm-up and sender reputation management
  • High-volume email infrastructure setup

Summary of Clients’ Reviews

Clients praise Senders.co for their expertise in resolving complex email deliverability issues and restoring safe sending practices. Customers appreciate their hands-on approach, particularly for diagnosing and fixing DNS and DMARC issues, ensuring successful inbox placement and protecting domain reputations.

Here's their top case studies: Arc, Parabola

And testimonials from clients:

“Getting things done more efficiently is a big part of what 8base is about. We understand the importance of fostering core capabilities without getting sidetracked a million times a day. Handling cold email outbound and deliverability in-house would mean just that – it would have been a frustrating, roundabout way to achieve a goal. So, for our own peace of mind, we wanted someone as capable and savvy as Senders to take care of that for us.”

- Karel Montes, Operations Manager

“If anyone understands the power of smart automation, that’s our team. After all, we built Parabola to help other organizations streamline their most time-consuming, tedious processes. We knew that cold email would be a strong addition to our outreach efforts and it could help us reach more people – if done right. So instead of putting it on all our plates, we found Senders. Their strategy team supported us in the early days of our collaboration, while their deliverability and infrastructure continue to serve as the base of our email outreach, making sure it’s as safe as it is effective.”‍

- Andrew Udell, Head of Operations

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Weekly release update: May Week 2
Updates from last couple of weeks! 👀 Salesforge 📬 Contacts Export Now Includes First & Last Names Exporting contacts just got more useful. All export files now include First Name and Last Name columns Easier sorting, personalization, and CRM syncing Smarter Product Cards with AI-Powered Evaluations Product card creation now comes with built-in guidance. Evaluate key sections like Pain, Cost of Inaction, and Solution AI gives instant feedback to help you write stronger messaging for better-performing email copy Simplified User Invites We’ve reduced friction and improved clarity in a key area. Admins now only enter the new user’s email and role. The user receives an email invite and sets up their own credentials. Anti-Spam Filtering in Validation Step We’ve added another layer of protection to your sequences. During email validation, we now detect and filter contacts associated with major anti-spam tools This helps protect your sender reputation and keeps your outreach clean New Integration: Salesforge x Sendspark Bring video into your cold outreach with our new Sendspark integration. Add personalized video messages to your sequences Humanize your outreach and improve reply rates New Integration: Salesforge x Make.com Salesforge now connects with thousands of apps via Make.com. Automate workflows between Salesforge and your tool stack—no code required Triggers include: email sent, opened, replied, bounced, unsubscribed, label changes, and more Agent Frank 🤖 Export Reports from Agent Detailed View Agent Frank reports are now downloadable. Export data directly from the Agent view Ideal for performance reviews, audits, and team sharing Localized Greetings Are Here Make your outreach more personal and relevant across languages. Frank automatically adjusts greetings based on the recipient’s default language (from LinkedIn) Replies adapt too, and a toggle allows users to enable or disable this feature New Logic Update: Spam Filtering Now Baked Into Agent Frank The same anti-spam filtering logic used in Salesforge is now integrated into Agent Frank. Cleaner contact lists Improved deliverability across all your campaigns Warmforge 🔥 Bulk Edits for Mailboxes Are Live Managing multiple mailboxes just got a whole lot easier. Apply changes to several mailboxes at once Save time and reduce manual work User Management in Warmforge Warmforge now supports multi-user workspaces. Admins can invite teammates directly Great for growing teams that need to scale warm-up efforts together Public API + Placement Tests API A major update for power users and developers. Public API: Programmatically manage mailboxes and automate warm-up workflows Placement Tests API: Run inbox placement tests via API, integrate results into dashboards, and catch issues before launch New free tools on salesforge.ai 🔨 Cold Email Expert GPT: Ask anything about cold outreach - strategy, ICPs, copywriting, deliverability - and get expert-level answers instantly. Roast My Cold Email Copy GPT: Use our ChatGPT-powered assistant to get brutally honest, high-impact feedback on your cold email copy. The Forge Sales GPT: Use our ChatGPT bot to create cold email sequences based on your ICP and value proposition. Cold Email Domain Generator: Generate secondary domain names for your cold email outreach to protect your email deliverability! Buyer Persona Generator: Generate your ICP & buyer persona template in minutes for more accurate outreach!