Hubsy Café & Coworking is centrally located. You can avail 3 types of workspaces, eat and drink at the same time. This place costs about $14 a day with supersonic internet speed of 230mbps.
A super cool hotel with a high quality Wi-Fi, different spaces where you can work and meet people coming from basically everywhere and a funny dancing hall! The prices are good, you can rent a bed in a dormitory or private rooms. The Staff is gentle and highly friendly.
Coworkshop is a nice co-working space with fast internet connection (45.5mbps down, 43.9mbps up), good coffee and snacks. You can pay hourly rate or daily basis and get free hot/ cold drinks.
Nuaga cafe is one of the best WiFi cafe in Paris. Excellent place for co-working with good coffee, cookies and snacks as much as you want at only 5 Euros per hour.
My favorite coffeeshop in Paris. There are not too many people (except for lunch), Wifi is good, the owners are nice, coffees and snacks are good (my favorite : ginger, lemon and honey infusion in winter).
A nice coffeeshop with Wifi, close to Place de la République. Original fruit juices. Other people were here with their computers.
Small but really nice coffeeshop with Wifi. It was full of other people working on their computers. Good teas and infusions.
Nice café with Wifi in Paris' 11th district. It makes the corner of two almost parallel streets. Sometimes many people go there with their computers.