Invoice Stack vs OutboundSync

Better Invoicing for HubSpotConnect direct to Xero or Quickbooks OnlineSuper flexible - fits the way you invoiceEasy to use + fantastic supportEliminate the admin pains from invoicing your HubSpot deals.However you do invoices, whether one-off, staged payments, deposits, or subscriptions, if you're using Quickbooks Online or Xero, Invoice Stack is the app for you.Say goodbye to...👎 Financial data in messy spreadsheets👎 No visibility over payments👎 Copying and pasting data between systemsStart your free 21-day trial todayFind out more at invoicestack.co, or book a demo.

You've found the best way to integrate Smartlead, Instantly, and EmailBison with HubSpot. OutboundSync is more powerful than native integrations. And it's easier to set up than Zapier, Make, n8n, or Clay—with more native capabilities inside of HubSpot.With OutboundSync, you can solve your deliverability challenges without sacrificing the power of HubSpot's customer-centric CRM. OutboundSync connects your sequencer (Instantly, Smartlead, EmailBison) to HubSpot—so you can finally track, automate, and control outbound at scale. It solves three key workflows:📬 Log and Route RepliesLog sends and replies as native email activities. Trigger tasks, phone/LinkedIn followup, workflows, and handoffs—right from the contact record. Associate to the right company record, too.📈 Attribute Meetings, Deals & RevenueTie outbound campaigns to pipeline and closed-won revenue with timeline events, custom properties, and pre-built dashboards.🚫 Maintain Do-Not-Contact ListsSync block contact- and company-based lists from HubSpot to your sequencer in real time—so you never cold email someone you shouldn’t.No CSVs. No building it from scratch. No guessing at field mappings, sync logic, or maintenance costs. OutboundSync works for teams that are scaling their outbound. SOC 2 Type II compliant with 25M+ records synced—and counting.OutboundSync is trusted by modern sales teams to handle their critical campaign data. Here's some feedback from our users and partners:⭐️⭐️⭐️⭐️⭐️OutboundSync is for teams with Smartlead and HubSpot“OutboundSync makes great use of our webhook and API infrastructure. They’ve built a deep integration for teams who want to land in the inbox with Smartlead and work in HubSpot.” - Smartlead Founder Vaibhav Namburi⭐️⭐️⭐️⭐️⭐️OutboundSync makes it possible"We have seen some crazy stuff from our tech partner OutboundSync, making it possible for our users to send bidirectional data between HubSpot/Salesforce and Instantly." - Instantly Director Felipe Aranguiz⭐️⭐️⭐️⭐️⭐️OutboundSync is a huge win"OutboundSync is a huge win for the EmailBison ecosystem. Anyone that has HubSpot or Salesforce clients and wants a native sync, please get in touch with Harris. We feature OutboundSync as a native card inside the EmailBison app." - EmailBison Founder Hassan S.⭐️⭐️⭐️⭐️⭐️OutboundSync enables a seamless integration"OutboundSync is one of the most important partnerships we've formed at our agency. A big thank you to Harris Kenny and the team for enabling seamless integrations with HubSpot and Salesforce. Your commitment to delivering a top-notch experience has been instrumental for our partners and their success." - C17 Lab Founder Enzo Carasso⭐️⭐️⭐️⭐️⭐️OutboundSync takes care of it for us"OutboundSync makes it so easy to get all of your data from Smartlead to HubSpot. Super easy to work with the team. Super easy to get set up. It’s way better than us doing it ourselves and trying to think of every situation. OutboundSync just takes care of it for us." - Growth Engine X Founder Eric Nowoslawski⭐️⭐️⭐️⭐️⭐️OutboundSync solved revenue attribution"Without OutboundSync, my clients would never know what happened to all the leads I brought in and how much revenue my work actually generated. Thanks to OutboundSync, now they know." - Blueprint Founder Jordan Crawford⭐️⭐️⭐️⭐️⭐️OutboundSync is the missing piece"OutboundSync is the missing piece for any growing sales team to keep HubSpot clean, while adopting a modern sales process externally. Our team loves the automation and reporting capabilities that OutboundSync brought us. It makes forecasting and strategy so much easier as we grow. Without it, our internal sales strategy would not be possible." Truss Payments Growth Manager Charlie Sykes⭐️⭐️⭐️⭐️⭐️OutboundSync makes HubSpot an outbound machine"The OutboundSync team have figured out a way to make HubSpot an effective outbound machine with its effective API connection with Smartlead. OutboundSync brings the power of modern outbound reach and capabilities to the most established CRM—enabling teams like mine to effectively run successful multi-channel campaigns on steroids. I love working with them. Their combined knowledge of the outbound world and HubSpot's capabilities brings clarity, agility, and more opportunity to my sales team." - TeamUP Founder Mike JonesEven if you don't need our app right now, please reach out if you think we can help you build a successful and fully integrated outbound program in your business.