Outsourced SDR Services · London-Born, Globally Delivered

London's SDR Agency for Companies That Can't Wait
to Hire

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 2 business days — with the people, tech, data, and playbook to start booking qualified meetings this month.

Over 350 Companies Trust Whistle
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Hiring SDRs in London is broken.

By the time your first in-house SDR is hitting quota, the market has moved on. Whistle gives you a tested, managed, multi-skilled SDR function — without the recruiting, the churn, or the £85k all-in cost per head.

We've tested them, broken them, rewritten them, and tested them again. What you're about to download is what works in 2026.
Scripts tailored to your ICP
We don't use templates. We write a custom playbook per client based on their buyer, market, and offer — before the first dial is made.
SDRs trained to deviate
Top callers throw the script out by minute 2. Ours are coached weekly on objection handling, tonality, and pacing — not just given a doc.
200+ calls a day, every day
Volume + quality, not one or the other. Live CRM updates, daily reporting, no excuses. You take the meetings, we handle everything else.

Copy. Adapt. Book meetings.

Every script includes a scenario, the copy-paste text, and a pro tip from our team.
25 Cold Calling Scripts – Whistle
Group 1 Openers
01
Quick intro + question
Cold outreach — no prior connection, decision-maker answers directly.
"Hey [Name], it's [You] from Whistle — I'll be quick. We help [company type] book more qualified meetings. Is that something you're actively working on, or not really a priority right now?"
The binary question disarms. Most prospects pick a lane instead of hanging up.
02
Mutual connection opener
When you have a genuine warm intro or LinkedIn 2nd degree.
"Hi [Name] — [Mutual contact] suggested I reach out. They thought what we're doing for their pipeline might be relevant to you. Have you got 30 seconds?"
Always name-drop before asking for time. Reverses the default suspicion.
03
Choose-your-own-path opener
Longer sales cycles where you want to qualify fast.
"Hi [Name], I'll cut to it — I'm calling about two things that tend to matter to heads of sales. One is pipeline volume, the other is rep ramp time. Which is the bigger headache for you right now?"
Gives prospect control. Whoever picks first tells you exactly where to go.
04
Compliment + bridge opener
Post-trigger event — funding round, hire announcement, award.
"Saw the Series B announcement — congrats on that. Companies at your stage usually hit a wall on outbound capacity around now. Is that showing up for your team yet?"
Keep the compliment tight. Long flattery kills credibility fast.
05
Gatekeeper rapport script
When you have to get past an assistant or reception.
"Hi — I'm hoping you can help me. I'm trying to reach [Name] about something sales-related. Is that something they handle, or is there someone better placed?"
Ask for help, not access. Gatekeepers respond to humility, not authority.
Group 2B2B SaaS Discovery
06
One-sentence value prop opener
First call to a VP Sales or CRO — high stakes, short window.
"We help Series A and B SaaS companies double their outbound pipeline in 90 days without hiring. Worth 15 minutes to see if it fits?"
Time-box the ask. "15 minutes" is a much softer yes than "a call."
07
Pain-point question opener
When you've done ICP research and know a likely pain point.
"Most VPs of Sales I speak to are dealing with one of three things: not enough qualified leads, SDR ramp time, or unpredictable pipeline. Which of those is most live for you?"
Three options trigger a choice. Blank questions trigger a wall.
08
Use-case spotlight (social proof)
When your prospect's competitor is a happy client.
"We've been running outbound for [similar company] for the last 6 months — they went from 8 meetings a month to 41. I thought it might be worth a conversation about whether we could do the same for you."
Real numbers beat vague claims every time. Have the stat ready.
09
Internal-referral intro
When you're working up or sideways in an org you're already in.
"[Name in their org] thought it'd be worth you and I connecting — they mentioned [specific context]. I won't take much of your time, just wanted to introduce the idea."
Internal credibility is the fastest path to executive access.
10
Demo invite (the close)
End of a discovery call — prospect is warm, ready to go.
"Based on what you've said, I think 20 minutes showing you exactly how we'd set this up for your team would be worth it. Does Tuesday at 2pm or Thursday at 10am work?"
Specific times get booked. "Next week sometime" gets ghosted.
Group 3Industry-Specific
11
Real estate home status
Residential agents following up on a dormant listing inquiry.
"Hi [Name] — you reached out about [address] a little while back. The situation's changed slightly and I wanted to make sure you had the latest before it moved. Still actively looking?"
"Situation's changed" creates urgency without pressure.
12
Healthcare / clinic outreach
Healthtech SaaS prospecting clinical managers or ops directors.
"Hi [Name], I know your time is tight. We work with [similar clinics] to cut the admin overhead on patient scheduling — some are saving 6+ hours a week. Is that the kind of thing worth 10 minutes?"
Lead with time saved, not tech features. Clinicians care about capacity.
13
Finance / fintech opener
Reaching CFOs, controllers, or ops leads in financial services.
"Hi [Name] — we help finance teams automate [specific workflow] — most are cutting 3 hours of manual work per close cycle. Is that on your radar at all, or not a priority right now?"
Finance buyers want ROI in minutes, not features.
14
Retail / e-commerce pitch
Reaching e-comm heads or digital trading managers.
"Hi [Name], we work with online retailers to increase repeat purchase rate without paid spend — mostly through post-purchase flows and reactivation. Worth a quick look at your numbers?"
"Without paid spend" is a strong hook for lean retail teams.
15
HR / recruitment script
Reaching Talent Acquisition or HR Directors about hiring pipeline.
"Hi [Name] — we help talent teams cut time-to-hire on hard-to-fill roles. Most clients see a 30–40% reduction without adding headcount. Are you dealing with any critical open roles right now?"
"Critical open roles" makes it personal and immediate. Generic pain doesn't land.
Group 4Follow-up & Reactivation
16
Post-event follow-up
24–48 hours after meeting a prospect at a conference or event.
"Hey [Name] — [Your name] from Whistle. We spoke at [event] on [day]. You mentioned [specific thing]. I wanted to follow that thread — is now a good moment for 5 minutes?"
Reference the specific thing they said. Shows you listened. Rare enough to stand out.
17
Webinar attendee check-in
Following up with registered attendees 2–3 days post-event.
"Hi [Name] — you joined our [topic] webinar last week. Wanted to check whether the [specific tactic] we covered was useful, or whether you had questions I could answer quickly?"
Give value before asking for anything. Positions you as advisor, not vendor.
18
Dormant-client revival
Re-engaging a past client or prospect gone quiet for 6+ months.
"Hi [Name] — it's been a while. We've launched [new capability] since we last spoke and I genuinely think it changes the conversation for companies in your position. Worth 10 minutes?"
Give them a reason to say yes that didn't exist before. Change = credibility.
19
Value-add resource drop
Mid-nurture touchpoint — no ask, just goodwill.
"Hi [Name] — not calling to pitch anything. Just came across [resource] and thought of your situation. Sending it over. No reply needed, but happy to talk it through if useful."
The zero-ask call is the highest-trust touchpoint in any sequence. Use it sparingly.
20
New-feature re-engagement
Existing leads who passed — reaching back after a product update.
"Hi [Name] — you looked at us earlier this year and it wasn't the right fit. We've since added [feature] which directly addresses [the objection they raised]. Worth revisiting for 15 minutes?"
Naming their original objection shows you remembered. That alone gets callbacks.
Group 5Objections & Voicemails
21
General objection handler
Prospect says "we're not interested" before you've even pitched.
"That's fair — most people I call say the same thing before they know what I'm calling about. Can I ask one quick question and if it's not relevant I'll get out of your way?"
Agree, then bridge. Never fight the objection head-on in the first 20 seconds.
22
"I don't have time" rebuttal
Prospect is dismissing the call before you've landed value.
"Totally get it — can I do this in 60 seconds and if it's not worth it, I won't call again? [Pause.] We help [role] at companies like yours [one-line value prop]. Worth a proper 10 minutes?"
The 60-second promise works because it's specific. Deliver it in under 60.
23
Voicemail drop (under 30 seconds)
First or second attempt — leaves door open without sounding desperate.
"Hi [Name] — [Your name] at Whistle. Quick message: we help [company type] with [one-line problem]. I'll try you again [day] — or if you want to reach me first, I'm on [number]. Have a good one."
Tell them when you're calling back. Creates a pattern interrupt when you do.
24
Gatekeeper redirect
You've been blocked twice — gatekeeper isn't going to budge.
"Is there someone else on the team who looks after the revenue or sales side of things? I don't want to keep calling [Name] if it's not their area — just want to make sure I'm talking to the right person."
Pivoting off the target makes gatekeepers helpful. They want you to call someone else.
25
End-of-quarter urgency close
Late in Q — prospect is warm but still hasn't booked.
"I want to be straight with you — we take on a limited number of new clients per quarter and I've got one spot left for Q[X]. If you've been thinking about it, now's genuinely the best time. Can we get 20 minutes in this week?"
Real scarcity beats fake urgency. Only use this if it's true — they'll find out if it's not.
6 tips that make any script work better

The technique behind the words.

01

Personalise the First 10 Seconds

One specific detail — a funding round, a LinkedIn post, a mutual connection — converts a cold call into a warm impression. Generic openers die fast.

02

Always Lead with Value, First

Nobody cares who you are in the first 5 seconds. Lead with what you do and who you do it for. Earn the right to introduce your brand.

03

Handle Objections in Your Opener

If "we already have someone" kills 40% of calls, neutralise it before it comes up. Build your rebuttal into the pitch, not after it.

04

Always Close with a Specific Time

"Tuesday at 2pm or Thursday at 10am" gets booked. "Next week sometime" gets ghosted. Specificity signals confidence and makes it easy to say yes.

05

A/B Test You Openers

Your opener determines whether you get the conversation. Split-test two versions per week. What wins becomes your control. What loses teaches you more.

06

Refresh Scripts Every Quarter

What worked in Q1 is stale by Q3. Buyer language shifts, markets shift, your competition changes their positioning. Scripts need a quarterly MOT.

They Whistled. We Delivered.

From early-stage startups to global enterprises, our clients share how Whistle changed the game.

"Whistle provided us with the structure and support we needed to make outbound a viable and repeatable part of our sales strategy. Their team was responsive, collaborative, and proactive in helping us test and learn what worked best for our audience."

Andrea Brown
VP of Marketing

“We knew the type of talent Whistle had access to, and they exceeded our expectations. Their BDR has helped us expand our pipeline and given us the bandwidth to focus on what we do best—delivering value to our clients.”

Ari Barmapov
Co-Founder & Head of Business Development

“Whistle provided an out-of-the-box solution for sales development, which was exactly what we needed to get up and running quickly. Their team’s ability to pivot strategies and maintain transparency throughout the campaign made them an invaluable partner in our business.”

Jamie Schell
Chief Business Officer
“We work very well together with Whistle. The communication is perfect. Any training or other requests I have for the Whistle team happen very quickly.”

Orel Levit
Director of Sales

A scripted opener gets you in the door.
Whistle gets you the meeting.

Real world results from companies that partnered with Whistle to generate qualified pipeline faster.
View More

Our Other Services

Whether you're refining your CRM, filling data gaps, or building a pipeline from scratch, our services are designed to meet you at your stage of growth and help you move forward faster and more efficiently.

Cold Calling

Convert leads through conversations. Our SDRs harness the phone to build trust and book qualified meetings for your sales team.
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Cold Email Outreach

Fill your calendar with warm meetings. We craft high-performing email campaigns, sparking real conversations that convert.
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LinkedIn Outreach

Build more connections with your ideal buyers. We run personalized LinkedIn outreach that earns replies and strengthens your network.
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Pipeline Generation

Never worry about top-of-funnel again. We build a steady stream of qualified leads so your team can focus on closing, not chasing.
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RevOps for HubSpot

Turn your HubSpot CRM into a revenue machine. We maintain your CRM, automate key processes, and help Sales and Marketing move faster.
Explore This Service

Data on Demand

Reach decision-makers, more easily. Our team delivers accurate, verified leads so your outbound never stalls because of bad data.
Explore This Service

Don't want to make the calls yourself?

Whistle's SDRs make 200+ calls a day for 350+ B2B companies. We handle the dialling, the objection handling, the follow-up — you take the meetings.

Frequently Asked Questions

Are these cold calling scripts free?
Will the scripts work for my industry?
Can I use these for cold email or LinkedIn outreach too?
What's the best opening line for a cold call?
How many scripts do top SDRs actually use?
Does cold calling still work in 2026?
Can Whistle run cold calling for my company?

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