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FlashRev vs Mailshake - Comparison 2025

FlashRev vs. Mailshake

Last updated on

Reviewed by Paddy Stobbs

Stackfix Co-Founder & CEO

PS

FlashRev and Mailshake serve distinctly different segments of the sales engagement market. FlashRev is the superior choice for medium-sized enterprises requiring robust phone outreach capabilities, with its advanced features like parallel calling and whisper coaching, along with a solid contact database and AI-powered sequence generation.

Mailshake, on the other hand, is better suited to small teams looking for a basic, low-cost outreach tool who already have a separate prospecting solution in place. While both tools offer multi-channel outreach including email, LinkedIn, and phone, FlashRev's modern interface and richer feature set make it the better choice for teams with sophisticated outreach needs.

FlashRev Product Logo

Advantages of FlashRev

FlashRev offers superior phone outbound capabilities compared to Mailshake
FlashRev's phone outbound features are central to its offering, with advanced capabilities like parallel calling and whisper coaching that Mailshake lacks. This makes it particularly valuable for sales teams heavily focused on phone-based outreach.
FlashRev has a substantially better contact database than Mailshake
FlashRev's native contact database is notably superior to Mailshake's, offering rich intent data and intuitive filtering compared to Mailshake's minimal and subpar database. This is crucial for teams who need reliable prospecting capabilities without requiring additional tools.
FlashRev is significantly better at sequence building than Mailshake
While Mailshake's sequence builder feels outdated and challenging to navigate, FlashRev offers a more intuitive and feature-rich sequencing experience. This is particularly valuable for sales teams who need to create and manage multiple outreach campaigns efficiently.
FlashRev has better AI capabilities than Mailshake
FlashRev includes AI email personalization and sequence generation features, while Mailshake lacks any AI functionality. This is particularly valuable for teams looking to scale their personalized outreach efficiently.
Mailshake Product Logo

Advantages of Mailshake

We don't consider Mailshake to have meaningful advantages.

FlashRev is best for

  • Businesses with US-centric, medium-sized sales teams requiring robust phone outreach capabilities
  • Who need an all-in-one sales engagement platform combining email, SMS, LinkedIn and phone outreach
  • And/or who need advanced phone features like parallel dialing and live whisper coaching for sales training

Mailshake is best for

  • Businesses with moderate engagement volumes and existing prospecting tools
  • Who need core email, LinkedIn and phone outreach capabilities without advanced features
  • And/or who need solid analytics tracking across multiple channels

FlashRev is less good for

  • Businesses with complex email-only outreach needs requiring sophisticated sequence automation
  • Who need deep pipeline analytics and conversion tracking
  • And/or who need extensive third-party integrations and API access

Mailshake is less good for

  • Businesses with complex sales sequences requiring advanced branching logic and automation
  • Who need robust native prospecting capabilities without relying on external tools
  • And/or who need advanced AI-powered features like email personalization and call analysis

Gallery

FlashRev logoFlashRev
FlashRev screenshot
Mailshake logoMailshake
Mailshake screenshot

Pricing, features & ratings

FlashRev logo

FlashRev

Starting at

$325

user / month

Billed monthly

Pricing calculatorVisit Website
Mailshake logo

Mailshake

Starting at

$29

user / month

Billed monthly

Pricing calculatorVisit Website
Stackfix Verdict
Functionality
7

Functionality

7/10

<p>FlashRev offers a fairly rounded set of functionality. On the engagement front, you get all the core channels you'd expect including email, SMS, LinkedIn and phone (the latter also comes with a lot of add ons including parallel dialling and live whisper coaching). Additionally, we were pleased to find a strong native contact database too. Our only critique is that the analytics suite is relatively light.</p>
5

Functionality

5/10

<p>Mailshake supports the core engagement channels you'd expect - email, phone, Linkedin. However, the functionality within each of these is quite light weight. Additionally, though it offers a native prospecting database, when tested we find it to be too low quality to be helpful.</p>
Ease of Use
7

Ease of Use

7/10

<p><span style="color: rgb(0, 0, 0);">FlashRev's web app is intuitive and easy to navigate. Additionally, its onboarding was simple and not overwhelming. It's core sequence building and analytics pages are intuitive and easy to get acquainted with. It would take an average SMB employee less than 30 minutes to master its use.</span></p>
5

Ease of Use

5/10

<p>Mailshake is relatively simple to use. It's core sequence builder, though rigid, is fairly easy to understand. It's prospecting database, though non-traditional, is lightweight enough to pick up easily too. It would take an average SMB employee 1-2 hours to master its use.</p>
Look and feel
5

Look and feel

5/10

<p>FlashRev's design is fairly middle-of-the-road. It won't win any awards for creativity or simplicity but it remains fairly intuitive to use across both its core prospecting and sequencing interfaces. When tested, pages were relatively fast to load too (around 1-2s).</p>
2

Look and feel

2/10

<p>Mailshake feels extremely dated. Its interface is buggy and slow with some actions (e.g. loading prospects from external sources) taking minutes to complete. We missed the lack of a modern drag and drop sequence builder as well as a more traditional prospecting interface.</p>
Customisability
6

Customisability

6/10

<p><span style="color: rgb(0, 0, 0);">FlashRev offers a number of channels for customisation, including basic ways such as creating custom searches in the prospecting database. There are also some deeper levels which you can customise your experience such as by providing their AI with ICPs and details about your value offering which can then be used to improve the output of AI generated emails and sequences.</span></p>
5

Customisability

5/10

<p><span style="color: rgb(0, 0, 0);">Mailshake offers a handful of routes for customisation, including basic ways such as integrating your CRM. There are also some deeper levels which you can customise your experience such as by providing their AI with details about your value offering which can then be used to improve the output of AI generated emails and sequences.</span></p>
Ease of Setup
5

Ease of Setup

5/10

<p><span style="color: rgb(0, 0, 0);">FlashRev offers a free trial for their platform (though it's unclear what plan you're on). When tested, we found the initial setup to be simple (taking &lt;10 mins). Additionally, connecting email addresses to their outbound platform was relatively trivial too - with a one click connect feature for popular providers like Google and Outlook. However, when choosing a paid plan, their pricing model is somewhat confusing with it being unclear what features are provided on each plan.</span></p>
3

Ease of Setup

3/10

<p>Mailshake does not offer a free trial. As such you'll need to pay to start using the tool. The onboarding process is rigid and forces you to connect emails and import prospects right off the bat. This would be fine if it weren't a slow and occasionally buggy process. Thankfully, you can one click to connect email accounts from common providers like Gmail and Outlook.</p>
Customer Support
3

Customer Support

3/10

<p><span style="color: rgb(0, 0, 0);">You can contact FlashRev's support via a live chat widget in their web app. When tested, the initial experience with the AI chatbot is poor, with it failing to answer many basic questions. Additionally, it proved difficult to connect with a real support agent (over 1 day). We also found their help centre docs to be somewhat overwhelming when searching for basic terms.</span></p>
3

Customer Support

3/10

<p>Mailshake offers support via a chat widget within its web app. Unlike many apps, this is not a live chat widget, and it does not offer an AI bot either. As such you will have to wait a few hours at minimum to get a response. That being said, once a response was received, we found them to be helpful and detailed.</p>
Integratability
3

Integratability

3/10

<p><span style="color: rgb(0, 0, 0);">Though FlashRev does provide integrations with core CRMs (HubSpot, Salesforce), automation platforms (Zapier) and email providers (Gmail, Outlook) - we would like to have seen native integrations with more established lead sources such as Apollo as well as an API.</span></p>
5

Integratability

5/10

<p><span style="color: rgb(0, 0, 0);">Though Mailshake does provide integrations with core CRMs (HubSpot, Salesforce, Pipedrive), automation platforms (Zapier) and email providers (Gmail, Outlook) - we would like to have seen native integrations with more established lead sources such as Apollo.</span></p>
Ease of Migration
4

Ease of Migration

4/10

<p>FlashRev offers self-serve export functionality to CSV for contact lists and other datapoints via their web app. They don't currently offer an API.</p>
6

Ease of Migration

6/10

<p><span style="color: rgb(0, 0, 0);">Mailshake offers self-serve export functionality to CSV for contact lists and other datapoints via their web app. Additionally, it offers an API through which you can directly interact with the product programatically too. </span></p>
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