Klozer vs JustCall: Performance and Reliability That Scales
99.99% Uptime, 11-Minute Support Response, and Transparent Pricing
Both platforms offer modern dialing features. The difference? Klozer delivers consistently. Get enterprise-grade reliability, responsive support that actually helps, and predictable pricing without surprise charges.
Enterprise Reliability, Startup Simplicity
Klozer includes predictive, preview, and progressive dialers as standard features. Aircall requires expensive add-ons for basic auto-dialing. Our AI algorithms maximize agent talk time by 300%, automatically adjusting dial rates based on real-time agent availability.
Support That Actually Responds
Send SMS campaigns, 2-way messaging, and bulk SMS directly from Klozer. Aircall lacks built-in texting capabilities. Our unified platform combines voice, SMS, and analytics in one workspace—no switching between tools or paying for separate SMS platforms.
Transparent, Predictable Pricing
Get round-the-clock human support included free. Aircall charges premium rates and limits support hours. Our transparent per-second billing and volume discounts save customers an average of $12,000 annually compared to Aircall’s rigid tier pricing.
Feature-by-Feature Comparison
See exactly how Klozer stacks up against Aircall across all critical features
Core Dialing Features
Feature
Klozer
JustCall
Predictive Dialer
AI-powered included
Included
Preview Dialer
Progressive Dialer
Manual setup
Local Presence
Automatic pools
Manual setup
Power Dialer
Click-to-Call
Voicemail Drop
Reliability & Performance
Feature
Klozer
JustCall
Uptime SLA
99.99% guaranteed
99.5% (frequent issues)
Call Quality (MOS Score)
4.72 average
3.9 average
Global Redundancy
6 continents
Limited
Automatic Failover
Instant
Delayed
Carrier Connections
800+ direct
Fewer
Support & Service
Feature
Klozer
JustCall
24/7 Support Availability
All plans
Higher tiers only
Average Response Time
11 minutes
4+ hours
Dedicated Account Manager
All plans
Enterprise only
Onboarding Assistance
Free white-glove
Self-service
Technical Support Quality
VoIP engineers
Tier 1 scripts
SMS & Messaging
Feature
Klozer
JustCall
Built-in SMS
2-Way SMS
Unlimited conversations
Limited
Bulk SMS
Unlimited
Pay per message
SMS Automation
Advanced workflows
Basic
MMS Support
Limited
Analytics & Intelligence
Feature
Klozer
JustCall
Call Transcription
95%+ accuracy included
Lower accuracy
Sentiment Analysis
Real-time AI
Basic
Custom Dashboards
Unlimited
Tier restricted
Real-Time Analytics
Sub-second updates
Delayed
Historical Reporting
Unlimited history
Time limited
Integration & API
Feature
Klozer
JustCall
50+ native
40+ native
40+ native
API Rate Limits
Generous limits
Restrictive
Webhook Support
Unlimited
Limited
Custom Integration Help
Included
Paid service
API Documentation
Comprehensive
Basic
Pricing Comparison
More features, better support, lower total cost
Klozer
from $50/month
- Predictive & Preview Dialers included
- Unlimited SMS & 2-Way messaging
- Advanced AI analytics & transcription
- Call recording with unlimited storage
- 24/7 support included
- 50+ CRM integrations
- No setup fees
Aircall
from $50/month + Variables
- Dialers included
- SMS: Pay per message
- Basic analytics
- Recording storage limits
- Support: Tier dependent
- Surprise charges reported
- Per-minute billing
Save 20-30% annually with transparent pricing
Why Companies Choose Klozer
Enterprise capabilities without enterprise complexity
Our intelligent algorithms predict agent availability and dial multiple numbers simultaneously, connecting agents only to live conversations. Increase agent productivity by 300% while maintaining compliance with automated DNC scrubbing.
Support That Understands VoIP
Make calls, send SMS, manage campaigns, and analyze performance—all from one platform. No more switching between tools. Reduce training time by 60% and increase agent efficiency with our intuitive workspace.
Predictable, Honest Pricing
Get instant insights with AI-powered sentiment analysis, automatic call transcription, and predictive performance metrics. Identify coaching opportunities in real-time and optimize campaigns on the fly.
AI Call Intelligence
Run SMS campaigns, send automated follow-ups, and have 2-way conversations—all included. No third-party tools required. Increase response rates by 8x with multi-channel outreach that works seamlessly with your calling campaigns.
Comprehensive SMS Platform
SOC 2 Type II certified infrastructure with end-to-end encryption, automatic compliance monitoring, and granular access controls. Your data is secure, and your campaigns stay compliant automatically.
Deep CRM Integration
Native integrations with 50+ CRMs including Salesforce, HubSpot, and Zoho. Automatic call logging, click-to-dial from any record, and real-time data sync keep your team focused on selling, not data entry.
Enterprise Security Standards
Get local and toll-free numbers in 100+ countries. Local presence dialing increases answer rates by 340%. Expand globally without opening offices—establish trusted local presence in any market within 24 hours.
Proven at Scale
Real human support available around the clock—no bots, no tickets lost in queues. Our average response time is 11 minutes. Get help from people who actually understand your business challenges.
Ready to Make the Switch?
Join 2,000+ companies that chose Klozer for better performance, reliability, and ROI
99.99%
Uptime Guarantee
11 min
Support Response
4.72/5
Call Quality Score
20-30%
Cost Savings
Frequently Asked Questions
Everything you need to know about switching from Aircall to Klozer
Klozer includes predictive, preview, and progressive dialers as standard features on all plans. Aircall requires expensive add-ons (starting at from $50/month) for basic power dialing, and lacks true predictive dialing capabilities. Our AI-powered predictive dialer adjusts automatically based on agent availability, maximizing talk time by up to 300%.
Which platform has better call quality?
Klozer includes comprehensive SMS capabilities (2-way messaging, bulk SMS, automated campaigns) built directly into the platform at no extra cost. Aircall does not offer SMS functionality—you would need to purchase and integrate a separate SMS platform, adding complexity and cost to your operations.
Is Klozer more expensive than JustCall?
Most customers save 40-50% annually. For a team of 50 users, typical savings are $12,000-$18,000 per year. This accounts for Klozer’s lower base pricing, included features that Aircall charges extra for (predictive dialer, advanced analytics, extended support), and no setup fees. Our transparent per-second billing also eliminates overage charges.
How does support compare between Klozer and JustCall?
Most teams complete migration in 3-5 business days. Our white-glove onboarding service (included free) handles: phone number porting (5-7 business days), data migration from Aircall, team training, and call flow configuration. You can start using Klozer with temporary numbers immediately while porting completes.
Can I migrate my data from JustCall to Klozer?
Yes, Klozer supports local and toll-free numbers in 100+ countries, matching Aircall’s coverage. However, our per-second billing typically results in 30-40% lower international calling costs. We also include local presence dialing, which Aircall restricts to premium tiers.
Does Klozer have the same integrations as JustCall?
No—you’ll gain features. Klozer includes everything Aircall offers plus: predictive dialing, built-in SMS capabilities, advanced AI analytics, unlimited call recording storage, and 24/7 support on all plans. We also provide more CRM integrations (50+ vs 30+) and better API access.
Will I experience downtime if I switch from JustCall?
Klozer provides 24/7 support on all plans (Aircall limits to business hours on lower tiers). Our average response time is 11 minutes vs 4+ hours for Aircall. You speak with actual support engineers, not tiered support scripts. Plus, dedicated account managers are available on all plans, not just enterprise.
How does SMS pricing compare?
Klozer provides 24/7 support on all plans (Aircall limits to business hours on lower tiers). Our average response time is 11 minutes vs 4+ hours for Aircall. You speak with actual support engineers, not tiered support scripts. Plus, dedicated account managers are available on all plans, not just enterprise.
Is Klozer more reliable than JustCall?
Absolutely. Klozer infrastructure auto-scales from 10 to 10,000+ concurrent calls without configuration changes. We process 180 million calls monthly for 2,000+ companies. If Aircall handles your volume, Klozer will too—with better performance and 99.99% uptime SLA.
Can Klozer handle our call volume if we switch from JustCall?
We provide free data migration services. Our team exports your call recordings, contact lists, and historical data from Aircall and imports them into Klozer. All data is encrypted during transfer, and we maintain full audit trails for compliance purposes.
Experience the Klozer Difference
See why 2,000+ companies trust Klozer for their contact center operations. Book a personalized demo today.