Hair building fiber brand price comparison cost comparison as of October 5, 2015:

Finally Hair: 28 gram bottle $19.29 (source Finally Hair website FinallyHair.com). Also sells refill bags in various sizes: 25 gram $12.49, 57 gram $21.69.
Use coupon code: TryFinally (get 25% off on your order plus free shipping in USA).

Toppik:  27.5 gram bottle $46.95 (source Toppik website toppik.com)

Caboki: 25 gram bottle $34.95 (source Caboki website caboki.com)

Xfusion: 28 gram bottle – Sells through retailers prices vary (source Xfusion website xfusionhair.com)

Bosley: 12 gram bottle $30.00 (source Bosley website bosley.com)

Viviscal: 15 gram bottle $24.99 (source Viviscal website viviscal.com)

Kerafiber: 28 gram bottle $44.95 (source Kerafiber website kerafiber.com)

Nanogen: 15 gram bottle $25.95 (source nanogen website nanogenhair.com)

Summary:

Finally Hair has the lowest cost hair building fibers on the market.  Our price is from 25% to 75% less than other brands like Toppik, Caboki, Xfusion, Bosley, Viviscal, Kerafiber and Nanogen on its refillable bottle of fibers.

Finally Hair also sells refill bags of hair building fibers that can be used in most brands of bottles for from 50 to 80% less per gram.  I couldn’t find refill bags from companies like Toppik, Caboki, Xfusion, Bosley, Viviscal, Kerafiber and Nanogen which means you have to buy and pay for their bottle over and over again.

Most bottles of fibers open.  Here is a picture of the components of a Finally Hair bottle which is similar to other manufacturer’s bottles:

We hope this cost comparison helps you to decide on which hair building fiber brand suites your pocketbook or wallet most effectively.

Finally Hair is not related to any of the other above brands.  All trademarks are the property of their respective owners. Finally Hair makes no guarantees about the above prices other than they were the published prices on the corresponding company’s website (like toppik.com, caboki.com, xfusion.com, kerafiber.com, nanogenhair.com, xfusionhair.com and viviscal.com on this date.