The best dialers for cold calling in the UK combine useful conversations, accurate follow-up, suitable UK calling routes, and clear costs. KrispCall leads this shortlist for growing teams evaluating sequential calling, Calilio follows for a lower published power-dialler seat rate, and RingCentral RingCX is a candidate for larger outbound operations.
This 2026 comparison covers KrispCall, Calilio, RingCentral RingCX, JustCall, CallHippo, and Ringover. It compares dialling modes, total cost, minimum seats, CRM compatibility, call-quality checks, and team fit. It also explains UK-specific considerations such as TPS and CTPS screening, PECR, and silent or abandoned calls.
Best UK Cold Calling Diallers: Quick Comparison
Currency labels matter: the Ringover UK offer below is GBP, while the published reference rates shown for Calilio, KrispCall, and JustCall are USD. They are not exchange-rate conversions or complete UK invoices. G2 scores describe the whole products, not a UK audio or compliance rating.
Customer Ratings From G2| Provider | Dialling Mode & Fit | UK Calling & CRM Checks | Pricing & Trial |
|---|---|---|---|
| Power dialling; shared business communication | HubSpot and Salesforce guides; test the UK route and campaign records | $32/user/month USDAdvance · Billed annually$40/user with monthly billingDemo; no free trial currently advertisedCheck KrispCall Plans | |
| Power dialling; UK calling charged under applicable rates | HubSpot available; Salesforce marked coming soon; test UK usage | $28/user/month USDPremium · Billed annually$35/user with monthly billingConfirm evaluation accessCheck Calilio Premium | |
| Preview, progressive, and predictive; deployment-specific quote | RingCX-specific Salesforce and HubSpot connectors; demonstrate outbound access | Request a RingCX quoteOutbound deploymentRingCX-specific demo; separate from RingEXReview RingCX Options | |
| Power; advanced shared modes on the appropriate SalesPro tier | Salesforce imports and HubSpot lists/sequences; check UK billing | $49/user/month USDPro · Billed annually · Minimum 2 licenses$69/user with monthly billing14-day trial; confirm enabled dialing modesStart 14-Day Free Trial | |
| Power and parallel; confirm UK package and campaign usage | Salesforce and HubSpot guides; test outcomes and live-answer handling | Request a dialer quoteConfirm region, currency and team sizeConfirm current trial accessCheck CallHippo Plans | |
| Business lists Power Dialer; minimum 3 users | Salesforce and HubSpot activity guides; confirm campaign rights | £34/user/month GBPBusiness · 12-month commitment · Excl. taxesMinimum 3 users7-day Smart trial; confirm power-dialler demo accessCheck UK Plans & Dialler Access |
How We Compared These UK Sales Diallers
We reviewed provider pricing, campaign and integration documentation, UK-specific offers where available, and official ICO and Ofcom guidance. We prioritise the package needed for the calling workflow rather than a generic phone-system starting price.
We have not performed a standardised hands-on benchmark across all six products. Best-fit labels are buying assessments, not measured conversion or audio rankings. Confirm account eligibility, UK number access, actual routes, and purchase terms for your organisation.
For terminology, read what an auto dialler does and how its main modes work. Automating number entry for a live agent and playing a recorded marketing message are different activities to assess.
1. KrispCall: Best For Growing Teams Using Sequential Calling
KrispCall leads this shortlist for growing teams that want sequential prospecting alongside shared calling. Advance includes Power Dialer, recording, and transfers. Evaluate the actual UK number, destination rates, and callback workflow rather than assuming every advertised allowance covers the planned campaign.
Dialling Mode: Power dialling; shared business communication.
Best Fit: A small or growing sales team that needs prepared-list calling and shared conversation context.
Buying Considerations: Advance costs $32 per user monthly with annual billing or $40 monthly and is positioned for up to 50 users. Verify calling-bundle eligibility, additional usage, and the exact connector you require. The pricing page states that no free trial is currently offered; a refund policy is a different arrangement.
UK Calling Demo Test: Run controlled calls to UK landline and mobile numbers from the agents’ normal work locations. Have another agent receive a callback, then inspect ownership, CRM history, and two-way audio.
Read our KrispCall review for more product context.
2. Calilio: Best For A Lower Published Power-Dialler Seat Rate
Calilio is a lower-subscription-cost candidate for sequential outreach, with power dialling, dispositions, and live monitoring on Premium. Its displayed free calling bundle covers US/Canada numbers, so it must not be treated as included UK calling. Request the relevant UK destination charges and number terms.
Dialling Mode: Power dialling; UK calling charged under applicable rates.
Best Fit: A smaller team evaluating a lower software seat price while budgeting UK numbers and calling separately.
Buying Considerations: Premium displays $28 USD per user monthly with annual billing or $35 USD monthly. Confirm number provisioning, UK landline and mobile rates, recording allowances, and the intended CRM connection. HubSpot is available; Salesforce is currently marked coming soon. US/Canada bundle minutes are not a UK allowance.
UK Calling Demo Test: Call controlled UK landline and mobile numbers, record outcomes, and reconcile the resulting usage with the quoted rates. Test the actual HubSpot workflow if required, including exclusions and next tasks.
Read our Calilio review for more product context.
3. RingCentral RingCX: Best For Larger UK Outbound Operations
RingCentral belongs here through RingCX, its contact-centre platform with several outbound modes. It is worth evaluating when UK prospecting forms part of a larger staffed operation with campaign administration, supervision, and incoming callbacks.
Dialling Mode: Preview, progressive, and predictive; deployment-specific quote.
Best Fit: A larger sales or contact-centre department with ownership of staffing, campaign management, and recipient experience.
Buying Considerations: Request a RingCX-specific outbound quote. RingEX business-phone pricing and a RingEX trial do not establish RingCX dialer entitlements. Include implementation, supervision, destinations, integrations, and staffing assumptions in the proposal.
UK Calling Demo Test: Run the required mode while agents take breaks and receive callbacks. Simulate several live answers and inspect connection delay, allocation, CRM associations, and the handling of exclusions.
Read our RingCentral RingCX review for more product context.
4. JustCall: Best For CRM-Connected Prospecting Campaigns
JustCall is a candidate when Salesforce or HubSpot segmentation needs to feed outbound calling. Its documentation covers Salesforce imports and HubSpot list or sequence-based campaigns. Power campaigns are assigned to one representative; shared dynamic and predictive modes need the appropriate entitlement.
Dialling Mode: Power; advanced shared modes on the appropriate SalesPro tier.
Best Fit: A sales team with at least two licences that wants prepared lists and next actions connected to CRM records.
Buying Considerations: Power Dialer campaigns are assigned to one agent; dynamic and predictive campaigns can be shared. Pro power dialing costs $49 per user monthly with annual billing and at least two licenses. SalesPro requires a quote for advanced campaign requirements. Do not budget a shared predictive workflow using Pro alone.
UK Calling Demo Test: Import a small eligible test list, complete a call to a controlled UK number, and request a callback. Inspect record ownership, notes, and tasks. Ask how the campaign handles list changes and how UK usage is charged.
Read our JustCall review for more product context.
5. CallHippo: Best For Comparing Power And Parallel Workflows
CallHippo is a candidate for teams comparing one-at-a-time prospecting with multiple simultaneous attempts. Its help centre documents power and parallel workflows. Obtain a UK-specific proposal and test the recipient experience instead of assuming a general phone-plan allowance covers automated campaigns.
Dialling Mode: Power and parallel; confirm UK package and campaign usage.
Best Fit: A staffed team evaluating whether parallel attempts improve useful conversations without causing poor handoffs.
Buying Considerations: Request a UK dialler-enabled quote specifying agents, mode, numbers, CRM rights, destinations, and usage. A calling allowance for manual US/Canada calls does not establish the cost of automated UK campaigns. Confirm trial access and support during UK working hours.
UK Calling Demo Test: Use controlled UK numbers to create live answers, voicemail, and simultaneous answers where relevant. Inspect agent allocation, delay, retry rules, CRM mapping, and actual billable campaign usage.
6. Ringover: Best For Power Dialling And UK Sales Coaching
Ringover is worth comparing for teams that want sequential prospecting and manager coaching. Its UK Business offer lists Power Dialer, analytics, monitoring, and whispering. The UK pricing and trial terms differ from those displayed on its US site.
Dialling Mode: Business lists Power Dialer; minimum 3 users.
Best Fit: A team of at least three users that wants prospecting blocks and supervisor involvement.
Buying Considerations: Business displays £34 GBP per user per month with a 12-month commitment, excluding taxes, and at least three users. The UK page also lists a £0.08-per-minute call-automation provision; obtain written clarification for the intended workflow. Its advertised seven-day UK trial is for Smart, with up to three users and 120 outbound minutes, so confirm power-dialler access separately.
UK Calling Demo Test: Ask for the exact Business power-dialler workflow and any shared-campaign access to be demonstrated. Test assignments, scripts, callbacks, CRM records, and manager controls. Confirm the applicable UK automation charges.
Read our Ringover review for more product context.
Power, Predictive, Parallel, Or Manual Dialling?
Power Dialling For Prepared Prospect Lists
A power dialler commonly works sequentially. It can suit researched accounts, individual representatives, and small teams that need preparation time. Confirm wrap-up, pause, retry, and callback controls rather than assuming the next attempt always waits for the agent.
Compare KrispCall Advance and Calilio Premium against the same eligible list and UK usage assumptions.
Predictive Or Parallel Workflows
Predictive pacing uses agent availability and campaign information to adjust attempts. Parallel dialling starts several attempts together. Products can combine these behaviours, so ask what happens when more recipients answer than agents can handle.
Evaluate the appropriate RingCX deployment or JustCall SalesPro tier for predictive requirements. Compare CallHippo for the actual power or parallel behaviour required. Test live-answer delay, agent breaks, and the recipient experience before increasing pacing.
Preview And Progressive Control
Preview presents a record for preparation. Progressive generally starts the next call as an agent becomes available. RingCX documents these modes. Manual or preview-style control can remain useful for high-value accounts where the conversation needs research.
Best Fit For Solo Reps, Small Teams, And Larger Operations
Solo representatives: Confirm minimum purchases before comparing per-user rates. JustCall Pro requires two licences and Ringover Business at least three users. Obtain the current minimum for every other offered plan rather than assuming a one-user purchase is available.
Small B2B teams: Prioritise preparation, record quality, callbacks, and the full bill. A sequential campaign may provide enough automation when agents research accounts or handle receptionist referrals.
Growing SDR teams: Test shared assignment, duplicate prevention, CRM ownership, and handoff. JustCall distinguishes individual power campaigns from shared advanced campaigns, and Ringover's shared-campaign access must be resolved against the current package.
Larger contact centres: Include staffing, supervision, campaign administration, incoming callbacks, and reporting. A broader RingCX deployment may be appropriate where the requirement extends beyond individual prospecting sessions.
For recruitment, preserve candidate context and agreed next steps. For property campaigns, preserve the property reference and callback owner. Financial services, pensions, and claims-related outreach require specific sector checks rather than a generic cold-calling assumption.
UK Cold Calling Dialler Costs And Billing
Compare the actual dialler-enabled package, contract, and currency. Published annual-billing references here include Calilio Premium at $28 USD, KrispCall Advance at $32 USD, and JustCall Pro at $49 USD per user monthly equivalent. Ringover's UK Business offer displays £34 GBP with a 12-month commitment, excluding taxes.
For five users, the USD references give monthly seat equivalents of $140, $160, and $245 respectively. Five Ringover Business users give a separate £170 GBP subscription figure under its displayed offer. These are not currency-equivalent comparisons or complete invoices. At its three-user minimum, Ringover's displayed subscription figure is £102 GBP.
- UK routes: Price landline and mobile destinations, inbound calls, forwarding, and automated campaigns.
- Numbers: Include rental, extra numbers, provisioning, porting, and any eligibility requirements.
- Licence rights: Confirm managers, shared campaigns, advanced modes, and minimum users.
- Integrations: Add required CRM tiers, API access, workflow features, and implementation.
- Additional services: Include recording, storage, transcription, AI, support, and screening arrangements.
- Billing: Ask about invoicing currency, any currency-conversion charges, applicable VAT or other taxes, upfront payment, and renewal.
Obtain a written UK quote for CallHippo and RingCX. Do not convert a foreign-currency website rate into a promised UK price. Calilio's displayed US/Canada bundle and a provider's manual-calling allowance are not evidence of included UK automated calls.
Use A Consistent Cost Per Outcome
For illustration, a pilot incurs £600 in software and usage costs and produces 20 attended meetings. That is £30 per attended meeting. This is not a vendor quote and excludes labour, contact data, advertising, and other acquisition costs.
UK Business Numbers, Caller ID, And Callbacks
Ask each supplier about the actual geographic or non-geographic number required, available area codes, eligibility checks, provisioning time, and callback route. Confirm voice and messaging capabilities separately; one type of business number does not establish every capability.
Use an accurate, reachable calling identity. A local-looking number does not guarantee an answer, prevent nuisance-call labels, or establish permission to call. Test what the recipient sees and where a returned call goes after the campaign has stopped.
For an overseas team calling UK prospects, confirm account eligibility, number access, support hours, and route quality. A UK number does not by itself establish that every account or campaign will be approved.
If you are moving existing numbers, agree on eligibility, timing, test calls, routing, and a fallback process before the change. Our international calling guide explains why number coverage and outbound destinations are separate checks.
UK Cold Calling: TPS, CTPS, PECR, And Data Protection
Live Marketing Calls And Previous Objections
For most ordinary unsolicited live marketing calls, ICO guidance permits calling numbers that are not registered with TPS or CTPS only where there is no previous objection to your calls. Stricter rules apply to some sectors, including claims management and pensions. Review the actual campaign rather than treating all B2B outreach as exempt.
TPS And CTPS Screening
The Telephone Preference Service and Corporate Telephone Preference Service record objections to live marketing calls. Screen the relevant lists and maintain your own suppression records. The ICO explains that calling a registered number requires the subscriber's specific agreement to your marketing calls; failure to opt out is not enough.
Automated Recorded Messages
For the ICO's automated marketing-call rules, the relevant distinction is an automated dialling system playing a recorded message. Specific consent for that type of call is required; general marketing consent or agreement to live calls is insufficient. Do not assume that a human-agent dialler and a recorded-message campaign have identical requirements.
Personal Data And Calling Identity
If you process personal data, assess the applicable UK GDPR and data-protection obligations as well as PECR. A lawful basis for processing is not a blanket override of marketing-call restrictions. Provide the required identity and contact information and configure caller-number presentation appropriately.
Use the ICO's live marketing-call rules and telephone marketing guidance to review the current requirements. Have the responsible compliance lead approve the workflow before launching it.
Silent Calls, Abandoned Calls, And Recipient Experience
Ofcom identifies automated dialling systems as a common cause of silent or abandoned calls and may take action over persistent misuse. Do not treat an old percentage threshold quoted in a sales presentation as permission to create poor calling experiences.
Demonstrate what happens when several people answer, an agent disconnects, or machine detection misclassifies a live person. Inspect connection delay, live-answer allocation, records, and the action when no representative is ready. Test these conditions before raising pacing.
Review Ofcom's guidance on unwanted, silent, and abandoned calls alongside the rules for the campaign. Software settings and reporting assist supervision; they do not make every campaign compliant.
Salesforce, HubSpot, And Complete Follow-Up
Test the exact connector and plan for matching, notes, outcomes, ownership, next tasks, and exclusions. A basic call log is different from a complete follow-up workflow.
JustCall documents Salesforce imports and HubSpot lists or sequences. KrispCall has setup guides for both CRMs. RingCX requires its product-specific connector and deployment; CallHippo and Ringover also publish relevant integration guides.
Calilio lists HubSpot as available and currently marks Salesforce as coming soon. Our Calilio integrations guide explains availability distinctions. Do not extend one connector's capabilities to another CRM.
Require exclusions to remain effective across imports and retries. A CRM do not call field does not prove the calling system blocks a record unless the mapping and campaign behaviour have been demonstrated.
AI Assistance, Recording, And Coaching
AI summaries, transcription, call classification, and coaching can assist a human representative. An autonomous AI voice agent speaks with the recipient itself and is a separate capability to review for message control, contact eligibility, identity, transfers, and pricing.
Do not assume an AI voice is exempt from applicable calling or data-protection requirements because it sounds conversational. Have the specific technology and use reviewed rather than relying on the product's “AI dialler” label.
For recording, establish the applicable requirements, transparency, access, retention, deletion, and cost. For coaching, demonstrate listening, whispering, and manager roles. Check AI summaries for incorrect names, dates, and commitments before using them for follow-up.
Trials And A UK Dialler Pilot
JustCall advertises a 14-day trial with campaign limits. Ringover's UK page advertises a seven-day Smart trial with up to three users and 120 outbound minutes; power-dialler access needs separate confirmation. KrispCall currently states that it does not offer a free trial. Confirm the actual dialler mode and evaluation access for CallHippo, Calilio, and RingCX.
A demonstration, a trial, a free software licence, and a refund policy are different arrangements. Self-hosted free dialler software can still require calling service, numbers, infrastructure, and administration.
- Prepare controlled UK numbers with owners, callback requests, duplicates, and exclusions.
- Test landline and mobile routes from the agents' actual headsets and networks.
- Demonstrate the required mode, wrap-up, pauses, agent breaks, and callbacks.
- Inspect CRM outcomes, tasks, permissions, and failed updates.
- Reimport records and verify that suppression persists.
- Reconcile actual charges, currency, and production entitlements with the offer.
Use the general auto dialler setup guide for rollout fundamentals. Expand only after the calling experience, records, and approved controls meet the agreed criteria.
Frequently Asked Questions
What Is The Best Dialler For Cold Calling In The UK?
KrispCall is a candidate for growing teams using sequential calling, Calilio for a lower published software seat rate, RingCX for larger outbound operations, JustCall for CRM-driven campaigns, CallHippo for mode comparisons, and Ringover for coaching. Confirm the actual UK package and routes.
Which Dialler Is Best For A Small UK Sales Team?
Start with preparation, callbacks, usable CRM records, and total cost. Compare Calilio and KrispCall for sequential workflows, then assess JustCall or Ringover where their additional capabilities justify the commitment and minimum seats.
Should UK Prices Be Compared In Pounds?
Use the actual invoicing currency and applicable taxes. This guide labels USD reference rates separately from Ringover's GBP offer. Do not treat an exchange-rate conversion as a confirmed local contract price.
Can I Cold Call Businesses Without Checking CTPS?
Do not assume that B2B status removes screening and objection requirements. Review the relevant subscriber, number, campaign, and any specific agreement under ICO guidance. Keep an effective internal suppression process.
Is A Live-Agent Power Dialler The Same As A Recorded Marketing Call?
No. A live agent speaking after automated number entry and a system playing a recorded marketing message are different activities. The ICO's automated recorded-call rules require specific consent for that type of call.
Does Ringover's UK Trial Include Its Power Dialler?
The UK pricing page describes a Smart trial, while Business lists Power Dialer. Ask for confirmation or a demonstration of the required feature rather than assuming the trial includes it.
Can Overseas Agents Call UK Prospects?
Confirm provider account eligibility, UK number access, routes, support hours, and the requirements applicable to the actual outreach. A UK caller ID does not by itself establish permission or service eligibility.
Can Software Make A UK Cold Calling Campaign Compliant?
No. Tools can help implement approved screening, suppression, identity, recording, and supervision processes. The campaign still needs review against current PECR, data-protection, Ofcom, and any sector requirements.
Customer Reviews: Practical Checks For UK Buyers
The G2 scores describe whole products rather than a UK-specific calling benchmark. These selected examples are paraphrased customer experiences.
A March 12, 2026 JustCall review rated 4/5 valued HubSpot integration, recording, SMS, and power dialling while reporting call-quality and pricing concerns. A February 4, 2026 KrispCall review rated 4/5 praised setup, integrations, and value while mentioning busy-hour lag and reporting limits. Test your UK routes, connector, and bill rather than assuming the same experience.
A May 12, 2026 Calilio review rated 5/5 praised the interface, routing, and analytics, while an October 28, 2025 review displayed 0/5 and described a number-capability mismatch and refund dispute. Confirm the actual UK number functions and contract terms before moving live work.
