# Page 3 | Thunderbird Reviews 2026. Verified Reviews, Pros & Cons | Capterra

> Page 3 - Is Thunderbird the right Email Management solution for you? Explore 156 verified user reviews from people in industries like yours to make a confident choice.

Source: https://www.capterra.com/p/230507/Thunderbird/reviews

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Thunderbird

4.4 (156)

[View alternatives](https://www.capterra.com/p/230507/Thunderbird/alternatives/)

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Last updated March 13th, 2026

# Page 3 - Reviews of Thunderbird

## Showing most helpful reviews

Showing 51-75 of 156 Reviews

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Rating

Company Size

Reviewer's Role

Length of Use

Frequency of Use

María Belén V.  
Manager  
Health, Wellness and Fitness  
Used the software for: 2+ years

### "Thunderbid un popular cliente de correo electrónico de código abierto"

October 30, 2023

5.0

Mi experiencia con Thunderbird ha sido sumamente positiva desde que empecé a utilizarlo hace algunos años. Como profesor universitario, necesito un cliente de correo electrónico confiable y lleno de funciones que me permita administrar eficientemente mi abundante correspondencia diaria con estudiantes, colegas y administradores. Thunderbird cumple perfectamente con mis requerimientos.

Pros

Que es gratuito y de código abierto, por lo que no hay costos de licencia, su interfaz sencilla y fácil de usar, ideal para usuarios novatos, altamente personalizable con extensiones, Está disponible para Windows, Mac y Linux, y su capacidad para gestionar múltiples cuentas de correo, unido a su flexibilidad en la organización y filtrado de mensajes.

Cons

Desventajas en este momento no le encuentro, porque han actualizado recientemente el software y se agregaron alguna cosa que eran casi indispensables. Pocas cosas que envidiar a los softwares similares de pago

Reason for choosing Thunderbird

Porque como dije antes, tiene muy pocas cosas que envidiar a los softwares similares de pago

Review Source

AS

André S.  
Electrical Engineer  
Civil Engineering  
Used the software for: 1-2 years

### "Thunderbird: a open-source free alternative to Microsoft's mail client."

August 11, 2021

5.0

The best problem I solved was that I could run this program in another operating system such as Linux, without needing a powerful computer to run it. As a result, the interface responded really quickly. The second most important point is that it is completely free, meaning there is no locked feature behind a paywall.

Pros

By far the most important part is that is just works. You can easily install it on your computer (even easier on Linux) and get back to where you were at. As it is developed by the Mozilla team, it is completely open source and free, meaning you won't have to rely on Microsoft business model. And in case something doesn't feel right or there is a killer feature that is lacking, most often than not you can find an add-on that suits your needs, for free! Oh, and it is really lightweight!

Cons

As it is not affiliated with Microsoft, it lacks advanced features present by default in Outlook. The spam detection, when you first start using it is not that great. However, the more you mark e-mail as spam the more the app gets right, learning from its experience.

Review Source

Austin M.  
Software Analyst  
Pharmaceuticals  
Used the software for: 2+ years

### "Thunderbird, the GO-TO Lightweight mailing client"

October 17, 2023

5.0

We started using Thunderbird as an alternative for our outlook clients, performing even better during the days, and making it a go-to software for our new installations.

Pros

I think the most impactful thing about Thunderbird is the community that uses the software, making it evolve constantly and performing better. It is awesomely easy to set up and makes yourself feel really at ease, with a simple UI and plugin enhancements that make it even better.

Cons

I think Cloud support could be more extensive, to make Thunderbird evolve to the next level, the team should really make it an objective inside the application.

Switched from

[Microsoft Outlook](https://www.capterra.com/p/227138/Microsoft-Outlook/)

We made the switch because of the problems and security issues, we resolved them with plugins + firewalls, features that could be only be accomplished with Thunderbird.

Review Source

VR

Verified Reviewer  
Senior Digital Sales Account  
Marketing and Advertising  
Used the software for: 1-2 years

### "Il miglior client di posta elettronica per la gestione di più indirizzi mail"

November 24, 2023

5.0

La mia esperienza complessiva è ottima anche perché le cartelle della gmail si sincronizzano in automatico e posso continuare a conservare documenti sul mio desktop a prescindere se gestisco la posta da smartphone o da tablet.

Pros

La possibilità di gestire in maniera chiara e separata più account di posta elettronica. Ne gestisco ben 8 diversi tra cui anche 2 account di google ed 1 PEC. Ben gestita e sincronizzata anche la mia casella PEC che utilizzo per lavoro. Filtri anti-spam molto molto efficienti !

Cons

Non cambierei nulla per me è perfetto così . Uso la versione per Mac da oltre 4 anni !

Review Source

NW

Niels W.  
Illustrator  
Arts and Crafts  
Used the software for: 2+ years

### "Please never stop working on Thunderbird"

February 21, 2023

4.0

I would be lost with Thunderbird. Just to have all email accounts in one tool, without the weird look of web based clients is so much better for me.

Pros

Basically to be able to combine all email accounts in one tool, set up fast filters to manage and archive everything, drag & drop mails between accounts.

Cons

Nothing really. It has all the features I need and comes with good add-ons.

Switched from

[Gmail](https://www.capterra.com/p/202338/Gmail/)

I just find Thunderbird so much better and easier to access then Gmail or other web-based clients.

Review Source

SG

Samuele G.  
Webmaster  
Apparel & Fashion  
Used the software for: 2+ years

### "Ottima applicazione per la gestione della posta, semplice e pratica"

July 1, 2023

4.0

Nel complesso estremamente soddisfatto, è il mio programma di gestione di posta elettronica predefinito da ormai diversi anni.

Pros

Molto facile da utilizzare e funziona molto bene, le notifiche di posta in arrivano sempre puntuali (a differenza di altri software che ho provato) e la grafica è molto intuitiva. Abbastanza semplice aggiungere nuovi indirizzi e-mail. Lo utilizzo da moltissimi anni e ci gestisco tutte e 6 le mie e-mail, per ora ne sono davvero soddisfatto.

Cons

Dal mio punto di vista si potrebbe migliorare la parte di ricerca delle vecchie e-mail, credo che funzioni abbastanza bene, ma graficamente è un po' caotica e faccio sempre fatica a ricercare quello di cui ho bisogno. Inoltre mi piacerebbe un app per Android di Thunderbird, che al momento non c'è.

Switched from

[Microsoft Outlook](https://www.capterra.com/p/227138/Microsoft-Outlook/)

Non mi piaceva molto graficamente e soprattutto alcune volte non mi arrivava la notifica di posta in arrivo. Parliamo comunque di diversi anni fa.

Review Source

VR

Verified Reviewer  
Responsable S.A.T.  
Information Technology and Services  
Used the software for: 2+ years

### "Email multiplataforma"

October 30, 2023

3.0

Pros

La instalación de este software es muy fácil de hacer e instalar incluso en maquinas con muy pocos recursos.

Cons

Si utilizas el importar desde Outlook es funcional pero al contrario te ofrece muchos problemas.

Alternatives considered

[Microsoft Outlook](https://www.capterra.com/p/227138/Microsoft-Outlook/)

Review Source

JD

Jacob D.  
Executive  
Retail  
Used the software for: Less than 6 months

### "I do not understand all of the hype around Thunderbird. I find it clunky, slow and barely usable. "

May 12, 2022

2.0

Overall my experience has been pretty awful. As has that of my employees. We all find Thunderbird incredibly clunky and unwieldy. It also looks like it's from 1995. Which wouldn't necessarily be a problem if the interface wasn't so messy and cluttered. I would have expected to sacrifice aesthetics for usability, but it turns out with Thunderbird you sacrifice both aesthetics, simplicity AND usability/workflow. I will continue to give Thunderbird a chance as I need a client that is compatible with Protonmail Bridge, but I will likely jump ship back to Protonmail in the near future.

Pros

There are a lot of add-ons (although the ones I have - Conversations and Quick Text - do not function smoothly). There are a lot of options to sort emails in different folders and the client is highly customizable.

Cons

Thunderbird, from my experience, is incredibly slow and buggy. There are constant glitches that seriously affect workflow. For example, emails I click on randomly go back to unread automatically, meaning I have to click on them several times to mark them as read again. Other times, when I'm responding to an email, the email will suddenly disappear, but it will be marked as read, so I'll have to search through all of my emails to find the correct one again. When I click from one inbox to another, some of the time a random email will be selected and marked as read. I then have to right click this email and mark is as unread as the one it selects generally isn't the one I intend to respond to. These glitches mean I constantly have to mark emails as read/unread, but there is no button on the dashboard to do this (there is with Thunderbird Conversations, but it doesn't work half the time), so in between writing emails is usually one or two times of having to right click>mark>unread/read. Again, breaking up the work flow. By default, Thunderbird doesn't show your replies inline. So in order to see your most recent reply, you have to go to your sent folder. Luckily, there is an add-on - Conversations - that fixes this. However, this add-on comes with its own bunch of issues. Namely, half the time when you repond, the reply won't be shown automatically inline (for at least several minutes). I've run out of space now, but you get the point.

Review Source

MaD

Marie ange D.  
Marketing  
International Trade and Development  
Used the software for: 1-2 years

### "Messagerie pratique "

December 8, 2023

4.0

Bon logiciel de messagerie qui est un coût moindre

Pros

La gestion de recherche est top et bien organisée

Cons

La gestion des archives est plus complexe

Switched from

[Microsoft Outlook](https://www.capterra.com/p/227138/Microsoft-Outlook/)

Organisation de l entreprise qui gère les logiciels

Review Source

HK

Haresh K.  
Partner  
Education Management  
Used the software for: 2+ years

### "Robust email client, Wish they had android app too!"

June 29, 2022

5.0

10/10 overall: Been using it for 15 years!!

Pros

(1) secure (2) Quick loading (3) Scalable to multiple accounts for the same user (4) Alias feature (4) Multiple add-ons for advanced features

Cons

They need to launch the mobile version too!

Alternatives considered

[Microsoft Outlook](https://www.capterra.com/p/227138/Microsoft-Outlook/)[Gmail](https://www.capterra.com/p/202338/Gmail/)

Reason for choosing Thunderbird

(1) ease of use (2) Security (3) Professional email mgmt.

Review Source

AS

Aby S.  
Student  
Legal Services  
Used the software for: 2+ years

### "Managing my time how to respond for your visiting mails "

November 5, 2022

5.0

Thanks for this innovative mailbox helping me benefit my time for more time at home. Please do keep working for this best service.

Pros

I use this simple art of sending emails attaching previous workspace references filtering how to respond to their immediate concerns. Thunderbird can classify these contact reports with much ease. This has helped many friends to get actual information with a simple inbox management.

Cons

I love adding more rules if less time can explore the most needed response. This plans how I can manage my business anywhere with this free software. This innovation always saves more cost if patches are introduced regularly for advanced users.

Switched from

[Microsoft Outlook](https://www.capterra.com/p/227138/Microsoft-Outlook/)

Thunderbird is used at my home because it is secure and free-of-cost.

Review Source

Mario A L.  
ti  
Venture Capital & Private Equity  
Used the software for: 2+ years

### "Es muy ligero para usar multiples cuentas"

November 5, 2022

5.0

Despues de mas de 10 años, sigue siendo mi software favorito de clientes email, ya que como menciona el titulo es muy ligero para usar múltiples cuentas, y la administración de los archivos es facil de importar y exportar.

Pros

Su interfaz aunque no la mejor ni la mas amigable, es buena y facil de organizar a comparación de otros software de clientes de email.

Cons

El software desde su interfaz principal es más bien feo, y poco amigable en cuanto a tanta personalización, ya que yo siendo ingeniero informatico, a veces me ha costado trabajo hacer funciones basicas.

Switched from

[Microsoft Outlook](https://www.capterra.com/p/227138/Microsoft-Outlook/)

Outlook me parece muy pesado, y lento a comparación de thunderbird.

Review Source

AC

Almudena C.  
Especialista comercial  
Insurance  
Used the software for: 2+ years

### "El gestor de correo de Moziila"

February 26, 2023

5.0

Un gran gestor de correo creado por Mozilla. Gratuito, personalizable y muy completo. No tiene nada que envidar a otras alternativas de pago.Desde hace años es mi gestor de correo... Lo empecé a usar cuando instalé Debian por primera vez y no lo he vuelto a cambiar! Tiene todo lo que yo le pido a un gesto de correo y mucho más.

Pros

La interfaz es muy amigable, pero aun así si no te gusta la que trae por defecto la puedes modificar a tu gusto. Lo que más me gusta, además de que sea completamente gratuito, es que es multiplataforma: Windows, Mac OS, Linux, Android, iOS, etc. Además, se puede integrar con los servicios de Google como el calendario y el gestor de contactos.

Cons

No le puedes poner muchas pegas a un programa tan completo y encima gratuito. Tal vez el consumo de recursos es demasiado elevado en algunos casos.También sería conveniente que tal vez integren alguna addon para realizar llamadas de voz y video, aunque en la actualidad ya hay muchas alternativas que lo ofrecen por lo que tampoco lo veo imprescindible.

Review Source

Jose J G.  
CTO  
Market Research  
Used the software for: 2+ years

### "One of the Best Email Management Tools"

November 26, 2022

5.0

I have been using Mozilla Thunderbird in a daily basis for years. I have seen how committed Mozilla Thunderbird team is to keep Thunderbird updated with the latest technologies and features. My experience is great so far andI totally recommend it to my clients.

Pros

I like the user interface, the add-ons and extensions, and how easy is to manage emails from my different online properties and domain names.

Cons

There is no cons. Mozila Thunderbird is great.

Switched from

[Microsoft Outlook](https://www.capterra.com/p/227138/Microsoft-Outlook/)

I feel that Mozilla Thunderbird is faster than Outlook.

Review Source

KK

Karambir K.  
CEO, IT Admin, Purchasing Decisions  
Non-Profit Organization Management  
Used the software for: 2+ years

### "Thunderbird for Mac OS Provides an Affordable Email Solution"

June 7, 2023

4.0

I am generally satisfied with Thunderbird and have been using it now for 4-5 years. It provides an affordable solution that is relatively easy to use. It doesn't always integrate well with Microsoft SSO email, but that is mostly due to the inflexibility of the IT decision-makers on the other end.

Pros

Having a free email client is essential for our small startup.

Cons

Event notifications popup and often do not close when I click dismiss or prompt me to update the event. This mostly occurs if I am responding to the prompt after the event as opposed to before.

Reason for choosing Thunderbird

I don't recall. The various forums recommended Thunderbird, as I recall.

Review Source

VR

Verified Reviewer  
Impiegato  
Retail  
Used the software for: 6-12 months

### "Thunderbird è il miglior servizio di posta, ecco perchè"

October 31, 2023

4.0

La mia esperienza con Thuderbird è molto positiva in quanto secondo me è il miglior servizio di posta elettronica ed è totalmente gratuito. La grafica è pulita e snella e ci viene offerto un indirizzo mail LDAP

Pros

Mi è piaciuto molto il fatto che sia completamente gratuito. Ha una grafica snella e senza fronzoli La posta viene inviata e ricevuta correttamente in velocità Offre un indirizzo mail LDAP

Cons

La gestione delle firme dovrebbe essere implementata, è macchinosa e poco intuitiva

Switched from

[Microsoft Outlook](https://www.capterra.com/p/227138/Microsoft-Outlook/)

Ho deciso di cambiare perchè Outlook era a pagamento

Review Source

James C.  
Sales and Marketing  
Marketing and Advertising  
Used the software for: 1-2 years

### "Best email manager with desktop version"

April 1, 2022

5.0

I've been using this manager for years and I just don't see myself using another desktop version. A good part of the team has already started using the tool and everyone loved it.

Pros

The ability to add and manage multiple email accounts draws a lot of attention in this software. We were able to customize each account with different signature, folders and redirects. The search system works very well, with specific filters for each type of search

Cons

Sometimes I had difficulty and slowness to do more specific searches, using keywords that were in the body of the email. I've had problems with the manager simply stopping working and having to restart.

Review Source

Fray Agustin G.  
Director de proyectos  
Civic & Social Organization  
Used the software for: Less than 6 months

### "Gestor de correos electrónicos de código abierto "

October 24, 2022

3.0

Lo empecé a utilizar como una alternativa a Outlook, debido que no necesita suscripción de pago. Aún lo mantengo como un servicio de respaldo.

Pros

Me agrada mucho que sea un software de código abierto, ello implica que tendrá muchas mejoras constantemente. Al ser gratuito es una excelente alternativa para pequeñas empresas u organizaciones.

Cons

Se podría mejorar poder vincular más fácilmente correos electrónicos de organizaciones, a veces tengo que intentarlo varias veces para que sea posible.

Alternatives considered

[Microsoft Outlook](https://www.capterra.com/p/227138/Microsoft-Outlook/)

Reason for choosing Thunderbird

Por ser una opción gratuita y de código abierto.

Review Source

yG

yann G.  
directeur  
Performing Arts  
Used the software for: 2+ years

### "logiciel de mailing avancé."

January 19, 2023

5.0

J'y retourne toujours malgré l'essai d'autre outils équivalentd.

Pros

La gestion des mails quelques soient leurs provenances, une personnalisation de l'interface ainsi qu'une synchronisation des évènements dans un agenda exportable. C'est un partagiciel, il est gratuit.

Cons

Sauvegardé les fichiers en cas de changement de poste de travail peu aisé.

Alternatives considered

[Gmail](https://www.capterra.com/p/202338/Gmail/)

Reason for choosing Thunderbird

Parce que c'est le meilleur en terme de facilité d'installation.

Review Source

Elisa C.  
Assistente Administrativo  
Computer Software  
Used the software for: 6-12 months

### "Thunderbird"

May 8, 2023

5.0

Minha experiência com esta ferramenta foi excelente me ajudou no processo de envio e recebimento de mensagens de forma tranquila e satisfatória. Além de outras coisas que pude acessar deste programa.

Pros

A ferramenta é bem fácil de usar, o layout do programa é bem atrativo, diversas funcionalidades que podem ser bem aproveitadas, pra mim foi muito gratificante usar este aplicativo. Não tive nenhuma dificuldade e me atendeu perfeitamente. Recomendo.

Cons

Nada a declarar, pois para mim atendeu minhas expectativas.

Switched from

[Microsoft Outlook](https://www.capterra.com/p/227138/Microsoft-Outlook/)[Gmail](https://www.capterra.com/p/202338/Gmail/)

O diretor da empresa resolveu padronizar o uso dos aplicativos utilizados.

Review Source

CK

Christelle K.  
Assistance de direction  
Food & Beverages  
Used the software for: Less than 6 months

### "Thunderbird, une messagerie d entreprise à ameliorer"

November 20, 2023

3.0

Utilisée dans le cadre de mon travail. Cela a nécessitant une mise en route et prise en main longue. Je la trouve peu fluide et pas instinctive. L impression de perdre beaucoup de temps a chaque fois. C est dommage

Pros

Je n apprécié que moyennement la messagerie professionnelle. Je trouve que c est compliqué de l'utiliser.... Elle n est pas très fonctionnelle. Recherche un message est super compliqué

Cons

Rechercher un message est super compliqué! Gérer la réception des messages aussi. Je ne trouve pas cette messagerie fluide

Review Source

Gonzalo M.  
Managing Director  
Oil & Energy  
Used the software for: 2+ years

### "A great free email client"

July 29, 2022

5.0

It's a great free email client.

Pros

It's free, well supported, and uses familiar UX metaphors (almost no learning curve).

Cons

Integrates less well into Windows than some alternatives.

Reason for choosing Thunderbird

It's free.

Switched from

[Microsoft Outlook](https://www.capterra.com/p/227138/Microsoft-Outlook/)

I needed a second client for other email accounts, and this works great and is free.

Review Source

MR

Matthieu R.  
Blogging  
Internet  
Used the software for: 2+ years

### "Pour gérer ses mails au quotidien"

November 20, 2023

5.0

Très bonne utilisation globale, je suis satisfait du logiciel depuis des années !

Pros

La gratuité, la gestion de diverses adresses mail et la sécurité sont les gros points forts de Thunderbird.

Cons

Depuis la dernière mise à jour, la recherche de mail est un peu fastidieuse : après validation des termes de recherche, les résultats ne sont pas toujours très pertinents.

Review Source

SC

Sandra C.  
Director of nursing  
Hospital & Health Care  
Used the software for: 1-2 years

### "HIgh security"

October 3, 2022

5.0

I would describe my overall experience as a win. Thunderbird is endorsed by software blogs and magazines that are trustworthy. It's practical and better than Outlook. Managing all components of email is much more efficient. Thunderbird is independent from Mozilla now. I wonder why Mozilla chose to drop it, I would rather they hadn't. I trust and use Mozilla Firefox because of the high security. When making a decision it's important to remember that Thunderbird is only an email client, it is not webmail.

Pros

\- Affordable -- No subscription needed. Community/open source. - High security -- Firewall. - Implementation in a reasonable amount of time with setup wizard. No manual setting adjustments. - Arrange folders in any way. - Extend features with add-ons. - Manage multiple accounts. - Manage group emails.

Cons

\- Client only -- Not webmail. - Antique look...

Alternatives considered

[Mailjet](https://www.capterra.com/p/130105/Mailjet/)

Reason for choosing Thunderbird

Thunderbird was endorsed by software blogs and magazines

Switched from

[Microsoft Outlook](https://www.capterra.com/p/227138/Microsoft-Outlook/)[eM Client](https://www.capterra.com/p/160239/eM-Client/)

Because eM Client performed poorly

Review Source

CD

Claudio D.  
Consulente informatico  
Information Technology and Services  
Used the software for: 2+ years

### "Miglior programma di gestione posta per desktop per archiviare e gestire le mail in locale."

December 3, 2022

5.0

Ottimo sostituto gratuito di prodotti a pagamento.

Pros

Gratuito (open source)Facile da usare.Gestisce separatamente anche molti account di posta.Facile da configurare, poichè per gli account più conosciuti e diffusi, si autoconfigura con i parametri (imap, pop3, smtp)Parecchi componenti aggiuntivi lo arricchiscono di funzionalità.Integrazione col calendario di google.Aggiornato frequentemente.

Cons

\- scarsine o troppo complesse le procedure di import/export per le mail e la rubrica- la rubrica ha una grafica non ridimensionabile, quindi in certi casi poco leggibile.- possibilità di inserire la firma nelle mail per ogni account, ma va preparata esternamente in html, quindi richiede una certa esperienza. Al contrario di altri software che permettono di "costruirle" graficamente in modo più semplice.- non legge il file winmail.dat- è capitato in passato che a volte con certi allegati nelle mail di tipo PEC facesse le bizze

Review Source

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