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How I improve my work?

Hello,
I have small company my colleague and I.
I'm looking a platform/cms free or payment where I manage client and work with my co-worker.
Generally this is the process.
I receive email > share on trello request with my colleague > decide price > send email to clieint with quotation> if client accept i generate invoice > client payment > start work
It's not that simple, because client send me a lot of email, often I don't contact anymore or i forgot for a lot of email.
With my colleague I talk on trello but isn't enough because usually in a job there is a lot of task and in discussion some task lost.
WIth client I use email, but it's not good because send a lot of email and it's difficult manage all request.
It's exist a platform who has all this request?
I know it's a lot of staff.
Thank u for yoru help
Comments
Write your own is the best way
Try something like: https://www.zoho.com/projects/
Unless his time worths nothing, this is insane.
@chiccorosso You want a software that integrates emails with a ticketing system. This way you can't lose anything. Here is one: https://hiverhq.com/shared-inbox and the free option probably suits your case.
Take a look to AgileCRM
As @deluxe said: Ticketing system would be the best option.
As an alternate, if you don't want to host anything, you can use a GSuite / Google groups and do this with assignments and it would basically be a ticketing system without the actual system.
Sounds like you need to manage your email better. I use gmail, simply because its spam filtering and searchability of emails is the best of the bunch.
Create labels on your emails and you're able to segment the noise from stuff you need to do stuff for.
Break your big problem into smaller ones and identify the areas that take most of your time.
check out basecamp
I use gsuite.
@korey Basecamp it's a bit expensive 99$ at month for 2 person!
@imok agilecrm do also invoice?
Checkout Collaborative Inbox then.
https://support.google.com/a/answer/167430?hl=en
No, but you can try Invoicely or And Co.
Connect them via Zapier
I have been meaning to try this out - https://www.beewits.com/what-is-beewits/
They have a 30 day trial and pricing is fixed (irrespective of number of users) and starts at $19.99/month
What captures my interest is that they have templates for different types of projects, you can invite your clients and looks like a good task tracking tool for teams.
i see a lot of think on codecanyon..like freelancer office what do you think about this php script?
Erpnext.
You have it all here, crm, project management, users, invoicing and so on.
This will basically cover all your needs, it may even be overkill.
I knew erpnext i try to install but i have problem so I leave it