Twilio vs VoIP.ms

SlickText

Omnisend

Klaviyo

SlickText is a text message marketing platform that enables businesses to communicate with their audiences through SMS and MMS campaigns. The software includes features such as mass texting capabilities, automated workflows with a drag-and-drop builder, audience segmentation tools, and one-on-one conversational messaging through an inbox system. It offers list growth tools including website popups, web forms, QR codes, and keyword-based opt-ins for subscriber acquisition.

Omnisend is an email marketing software designed specifically for ecommerce businesses. It combines email, SMS, and web push notifications in a single platform with pre-built automations for cart abandonment, welcome series, and post-purchase campaigns. The platform features advanced segmentation capabilities that update in real time based on customer behavior and integrates with multiple eCommerce tools.

Klaviyo is the all-in-one platform built to help B2C companies grow by integrating email/ SMS marketing, full-funnel analytics, and service in one solution. Powered by customer data and built-in AI, Klaviyo makes it easy to scale marketing automation and personalization across all your channels.

Head

Level of customer service - our issue with the US carrier is being handled for more than 2 weeks with no success. And Twilio is based in the US.Use of AI in Customer support - no result, tons of disappointment.

Manager

Their customer verification process is unnecessarily burdensome and inefficient. Despite providing complete details about my LLC, business purpose, and intended use case in my initial response, I received identical verification requests from three different support representatives [sensitive content hidden], each asking for the exact same information.

Customer Success Manager

It integrates with our system and they are responsive on the Support team.

The customer service was also good, and they were able to help me with any questions I had.

Twilio offers an API for phone services enabling companies to make and receive phone calls and send and receive text messages. It allows programmers to integrate various communication methods and to use existing web development skills and codes to solve communication problems.

2-Way Messaging

Access Controls/Permissions

Alerts/Escalation

Alerts/Notifications

Analytics

Archiving & Retention

Audio/Video Conferencing

Automated Attendant

Automated Responses

Automated Routing

Automatic Call Distribution

Automatic Outbound Dialer

Blended Call Center

Call Center Management

Call Conferencing

Caller ID

Call Logging

Call Monitoring

Call Recording

Call Routing

Call Scripting

Call Tagging

Call Tracking

Call Tracking Metrics

Campaign Management

Chatbot

Chat/Messaging

Collaboration Tools

Compliance Management

Computer Telephony Integration

Conferencing

Contact Management

Data Management

Event Triggered Actions

Fax Management

Inbound Call Center

Live Chat

Manual Dialer

Mass Texting

Message Personalization

Mobile Coupons

Multi-Channel Communication

Multiple Scripts

Natural Language Processing

On-Demand Recording

Online Voice Transmission

Outbound Call Center

Performance Management

Phone Key Input

Polls/Voting

Purchasing & Receiving

Queue Management

Real-Time Chat

Recording

Reminders

Reporting/Analytics

Reporting & Statistics

ROI Tracking

Scheduled Messaging

Scheduled Recording

Shortcodes

SIP Trunking

SMS Marketing

SMS Messaging

Speech Recognition

Status Tracking

Text to Speech

Text-to-Win

Third-Party Integrations

Unified Communications

Video Conferencing

Voice Customization

Voice Mail

Voicemail Transcription

VoIP

VoIP Connection

Workflow Management

By industry, Twilio reviewers are most commonly professionals in computer software (20%). The most frequent use case for Twilio cited by reviewers is SMS marketing (65% of reviewers).

Users and use cases

Reviewers appreciate Twilio’s pay-as-you-go model, competitive rates, and cost-effectiveness for scaling. However, some users report confusing pricing, high costs as usage grows, and limited affordable options for small or low-volume businesses.

Value for money

The Twilio integrations most frequently cited by reviewers are: Zoho CRM (a CRM product rated 5.0 out of 5 for its integration with Twilio), Zendesk Suite (a help desk product, 4.5), and Zapier (an integration product, 4.7).

Integrations

Twilio is an SMS marketing tool offering key features such as SMS messaging, mass texting, API integration, scheduled messaging, and message personalization, among others.

Twilio

Windows

Web-based

Linux

RingEX

CallHippo

Bird

Telnyx Suite

CallRail

Constant Contact

Mailchimp

Vonage Contact Center

RingCX

Ringover

Google Voice

Brevo

Grasshopper

Twilio SendGrid Marketing Campaigns 

WhatsApp Business API

Voice APIs

Twilio SendGrid Email API

Lookup

Slow platform and support response

66% of reviewers feel negative about Twilio’s performance and speed. Some users report slow website loading times, sluggish UI, and delays in API responses, which can hinder real-time operations. Reviewers indicate onboarding and verification processes are time-consuming, and support response times are often lengthy. They say service interruptions and unresolved technical issues disrupt communication features. Users find these delays and instability problematic for businesses requiring fast, reliable interactions and efficient troubleshooting.

Difficult account setup and maintenance

Developer

Our account kept getting disabled due to suspicious logins which was just me under a VPN and had quite a few days of downtime because support wouldn't believe it was me.

Owner

So you do that believing you will be able to use the service, and then they immediately restrict your account pending management review that takes days.

54% of reviewers feel negative about Twilio’s account management. Reviewers indicate account verification and setup processes are confusing and prone to repeated requests for information. Users report frequent account suspensions, unexpected restrictions, and poor communication from support regarding account issues. Some reviewers say managing sub-accounts and authentication is complicated, and payment or billing disputes can lead to abrupt account holds. They find these challenges disruptive and frustrating for maintaining business continuity.

Consistent and dependable service

Customer Manager

We have not had problems, the software guarantees continuity.

Support Head

Twilio has a robust and reliable platform, ensuring high uptime and reliable message delivery.

89% of reviewers feel positive about Twilio’s reliability. Reviewers indicate Twilio delivers stable uptime and dependable message delivery, which is crucial for business operations. Users think the platform’s robust infrastructure ensures continuity and minimizes disruptions. They appreciate Twilio’s high success rates for communication, noting that its reliability gives them confidence in managing virtual numbers and messaging services. Some reviewers report years of consistent performance and say Twilio’s reliability is a key reason for their continued use.

Versatile voice and messaging APIs

Software Engineer

Twilio provides the layer of programmable voice api, it means you can use their sdk to build an messaging and calling application easily, it starts cheap and for small scale of application, it is very good.

Instructor

With its simple APIs, I was able to add messaging, voice, and video functionality without complex coding or infrastructure setup.

91% of reviewers feel positive about Twilio’s voice and messaging capabilities. Reviewers indicate Twilio offers a broad set of APIs for integrating voice, SMS, video, and chat into applications. Users appreciate the flexibility to customize communication workflows, automate messaging, and access advanced features like call recording and text-to-speech. They say Twilio’s ease of integration and scalability help them connect with customers efficiently across multiple channels. Reviewers find the platform useful for both small-scale and enterprise solutions, highlighting its ability to simplify complex communication tasks and enhance business operations.

Unified multi-channel communication

Managing Director & Software Developer

Scalability: Twilio is designed to handle high volumes of traffic, making it a good choice for organizations that need to send or receive large numbers of communications on a regular basis.

89% of reviewers feel positive about Twilio’s communication platform. Users think Twilio enables seamless management of voice, video, messaging, and email from a single interface. Reviewers appreciate the platform’s scalability and global reach, allowing them to engage customers in real time and personalize interactions. They say Twilio’s integration with other business tools streamlines workflows and improves operational efficiency. Some reviewers find the ability to unify communication channels especially valuable for supporting customer service, team collaboration, and international connectivity.

Digital Marketing Specialist

We use Twilio for automating the confirmation texts for our clients’ workshop sign-ups, feedback loops, etc.

Backend Developer

We used Twilio for OTP and notification messages in one of our project  , and the message delievery was quite consistent.

On top of that, the platform is poorly usable, unnecessarily complex, and the documentation does not help with real-world implementations.

This results in wasted development time, increased costs, and a lack of trust in the platform for production use.

Founder

They have the best UI for omnichannel messaging for SMS, MMS, RCS, WhatsApp and conversational AI.

Head of digital

We received some programmable wireless SIMs and Super SIMs for IoT devices from our IoT partner that were already set up in Twilio. When we received these saying they were Twilio products, these products have been migrated to Kore (a different company who acquired Twilio's IoT products) but most of the functions can still be handled through Twilio.

It has a huge amount of features that you can use to communicate with your customers, whatever you are thinking about, it's here

The phone number I purchased has been unusable (returning busy signals when called) while this verification process drags on. When I attempt to test my configured flow, it doesn't work, likely because the account verification is pending.

VP of Marketing

It offers powerful APIs that let you easily build and customize omnichannel campaigns.

Customer Support Lead

You also cannot open the messages in a new tab, so it makes for having to troubleshoot and review messages a bit tedious to go back and scroll again.

Director, DX

Twilio has pretty broad integrations across a variety of platforms.  

Remote OPI and VRI Interpreter

I found the platform to be very simple but intuitive and at the same time fast and concise as an analyzer of the system data needed to apply for certain jobs that needed specific system requirements.

It also allowed the onboarding team to speed up the verification of requirements in order to continue with the processes without further delays.

Customer service representative

for the most part twilio was a good source thru my employer and communicating with customers and the leniency to make the calls

Pricing also started feeling a bit high as usage increased.

IT Coordinator

Twilio makes it easy to configure campaigns for phone numbers and services.

Many of the reliability issues we have experienced with Twilio are easily reproducible and solvable but Twilio does not invest in resolving these issues or are not capable.

There's a learning curve, particularly if you're not accustomed to APIs or cloud-based communication logic in general.

I use it because it is the resource that several other services I need uses to integrate messaging services. If there was a better option I'd probably go with that.

Outreach Director

It allows for secure access and connection to the team.

After the initial setup , it worked reliably for our need.

We use Twilio to send automated texts for bookings through an API.

Vice President

Learning curve was a little difficult at first but it didn't tak elong.

Lead Developer

Their asynchronous tasks rarely completely in the browser, the web interfaces glitches and flickers randomly, and the error messages are minimal and require getting in touch with their cookie cutter customer support team (zendesk).

They also provide very responsive customer support.

Then you go to Twilio and get your Auth Token (second .env) and create a Service that has its own token (third .env) , then you integrate that with your sendGrid Template and I forgot where exatly but there some fourth token you need.  

Owner/ Operator

Now when customers call they can choose from an option tree to troubleshoot their issue or they can choose to talk to an agent (me) and if it's during business hours the call gets forwarded to my cell, if outside of business hours they get my voicemail.

Twilio also has a wide range of features like phone numbers, SMS, MMS, chat, video, and more that can all be implemented in just a few lines of code.

There is very little proactive communication.

My use was on a customized platform, and it feels very hard to navigate.

Director

not very easy to use for those who don't have programming experience. Although can be used if a non technical person follows a step by step tutorial for your specific use case

It made work that had to be secure possible, even though it feels cumbersome.

Once set up, there is little to no interaction,

I attempted to set up a simple Twilio phone system for a family cabin gate entry solution.

No one could sign up to our service for days. If you want to lose your clients and damage your business use twilio.

Franchise Owner

I like that I am able to quickly text individuals or groups of users when last-minute issues arise that I need to inform them of or reminders about our services that I need to send.

Director of IT

We don't use all the features, but love knowing it can do so much when and if we do need it.

The approval process takes time, but works great once everything is approved.

It's a solution to purchase and use numbers, and it's critical for our marketing ops

Twilio vs VoIP.ms Comparison (2026)

Twilio

VoIP.ms

Overview

Video & Screenshots

Pricing

User reviews

Key features

Integrations

Alternatives