Building an in-house SDR team takes 6 months and costs £85k a year per rep. Whistle gives you a fully managed SDR function in 10 business days with the people, tech, data, and playbook to start booking qualified meetings this month.
Most SDR agencies onboard in 4–6 weeks. We get you live in 10 days. From kickoff call to first outreach, faster than you can finish interviewing candidates.
We hire 1 in 500 SDR applicants. Your reps are not generalists, they're top performers who've been through our rigorous selection process.
We bring our own stack - dialler, sequencer, data. You just need a calendar link. Nothing to install, configure, or maintain.
Phone, email, and LinkedIn, coordinated, not siloed. Single-channel SDRs leave 60% of pipeline on the table. We don't.
An experienced and dedicated customer success manager ensures your campaign strategies are in place, your team stays focused, and that we achieve our results.
You'll have access to live reporting including insights into campaign performance by geography, titles, industry, company size and other metrics.
From early-stage startups to global enterprises, our clients share how Whistle changed the game.



Our SDR pods are based across multiple geographies including the UK, US, EMEA, and APAC. Your dedicated pod is matched based on your target market, ICP, and time zone — not just availability. Account management is London-based.
Whistle's Done For You SDR service starts from £5k/month per pod (typical engagements run £10–20k/month). Plug & Play SDR starts from £4k/month per SDR. Both options compare favourably against a London in-house SDR's all-in cost of £85k+ per year with faster launch and zero churn risk.
5 business days from signing. We handle all tech setup, SDR matching, and playbook build internally. You don't need to integrate anything on your end — just share a calendar link and your ICP brief on the kickoff call.
Whistle works primarily with B2B SaaS companies, though we have experience across financial services, professional services, and technology more broadly. Our SDR pods are matched by industry experience so your reps understand your buyers before the first call.
No. Whistle is a global agency with headquarters in London. We have worked with over 350 companies across North America, Israel, the UK, and Australia.
Yes. All meetings are booked directly into your calendar. All contacts, data, and CRM records belong to you. We don't hold anything back.
Yes. Whistle is designed to flex with your business. Most clients start with one pod and scale within six months. You can add SDR capacity, open new geographies, or target new ICPs without additional hiring overhead.
We ask for an initial three-month commitment to allow enough time for the playbook to be tested and optimised. After that, engagements are rolling monthly. We find that clients who give the programme enough time to mature see significantly better results and most choose to stay and scale.
Sure! You can test out Webflow on our free plan where you can experiment with 2 projects. Your unhosted projects will have a two-page limit, but you can purchase a site plan on a per-project basis to unlock up to 100 static pages and additional CMS pages.
A project is a website that you build in Webflow. You can publish projects to a webflow.io staging subdomain for free, export the code on a paid plan, or add a site plan to connect your custom domain and unlock hosting features.
Pro accounts can add their own logo to Client Billing forms and the Editor. Pro accounts can also remove references to Webflow in the source code and form submission emails, and hide the Webflow badge from their staging sites.
Webflow hosting scales automatically to handle millions of concurrent visits. All site plans serve sites through our Amazon's Cloudfront CDN and accelerated using Fastly, loading sites in milliseconds.
We offer fast email support to paid accounts and prioritized help for team accounts. Community support (forum.webflow.com) is available to free accounts.
If you're new to building websites, our video tutorials will get up and running quickly. If you already know concepts behind CSS and the box model, you will feel at home in Webflow.